Undyed bright single viscose continuous-filament yarn, industrial delivery

1. Scope and Applicability

This methodology covers a single industrial xanthate-route product boundary, not an entire classification leaf. JRC describes continuous viscose filament manufacture; ENKA independently establishes real commercial continuous-filament supply. These sources are a bounded technical synthesis, not a claim that one SKU/plant supplied every process parameter. The terminal reference is actual net accepted yarn delivery. Retail rewinding, multiple/cabled yarn manufacture, staple spinning and finished-fabric rules cover different transformations. [Sources: jrc-polymers-2007; enka-filament-products; enka-industrial-recovery.]

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.other-transportable-goods-except-metal-products-machinery-and-equipment.other-chemical-products-man-made-fibres.artificial-filament-yarn-except-sewing-thread-and-multiple-or-cabled-yarn-not-put-up-fo-6963aefa
classification_refs	CPC 3.0 35550; narrower route-specific methodology, mapping acceptance separate
covered_products	Undyed bright single viscose continuous-filament yarn made from wood dissolving pulp through NaOH/CS2 xanthation and continuous acid-bath wet spinning, delivered in industrial packages
excluded_products	Staple-cut then respun yarn; tow/staple feedstock including CPC 35540; lyocell/NMMO, acetate, cupro and synthetic-polymer yarn routes; dope-dyed/delustered grades; sewing thread; multiple/cabled yarn; retail put-up; tyre cord; polymer resin or unspun dope as terminal output
representative_product	Washed, finished, dried and wound bright viscose single continuous-filament textile yarn for subsequent weaving/knitting; actual titre and filament count declared, not fixed from a catalogue example
production_route	Wood pulp receipt -> alkalisation/pressing and liquor return -> ripening/xanthation -> dissolution/filtering/deaeration -> continuous acidic wet spinning -> washing/finishing/drying/winding -> quality release P -> conditioned finished stock/packing/handling -> actual accepted dispatch Q; retain gas/liquid recovery and treatment
market_state	Actual accepted industrial net yarn delivery at producing-site dispatch gate, including declared stored-stock history; excludes downstream external distribution and fabric conversion

3. Reference Flow

Field	Value
What	Supply undyed bright single viscose continuous-filament yarn for downstream textile processing
How much	1 kg net actual accepted industrial delivery
How well	Declared titre/filament count/tenacity/twist and one verified conditioning, moisture and spinfinish basis; no assumed standard regain
How long or cycle	One declared delivered cohort with full production/WIP/stock history; no yarn service lifetime assumed
reference_flow_link	delivered_yarn

Field	Value
Reference amount	1
Reference product flow	Artificial filament yarn (except sewing thread and multiple or cabled yarn), not put up for retail sale af18d089-ed9e-4dd9-b3e3-5f5decb6c61b
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	viscose NaOH/CS2 xanthate continuous wet-spinning route; undyed bright single continuous-filament industrial yarn excluding sewing thread and excluding multiple/cabled yarn and excluding retail put-up; declared linear density dtex and filament count and cross-section and tenacity and twist state; one declared conditioning temperature/RH/time and actual delivered moisture/finish basis; measured net yarn mass with tubes/cartons/film tare excluded; actual net delivery gate Q with unique acceptance cohort and reporting interval with P tracked separately; opening/closing WIP and finished-stock quantities and carried exchange vectors including failed runs/returns/rework; actual plant/geography and supplied solution assays and recovery systems and coproduct form and effluent receiver

Declare every qualifier in the concrete dataset. The native reference is a manufactured finished Product flow, production mix at plant, with no CAS, geography/locationOfSupply, fixed route/grade, titre, conditioning regime or supplier. It is compatible as a generic reference identity only and does not prove ENKA provenance or quantity. The restrictions are retained in every UUID-bearing inventory card.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use 1 kg net delivered yarn at one declared conditioning/moisture/finish basis, excluding tube and all packaging tare. Record actual moisture and retained spin finish; do not silently report dry cellulose as conditioned yarn.
titre_check	reference product	Mass	kg	dtex means grams per 10000 m; mass_kg = dtex * length_m / 10000000 only for the same verified conditioning, finish and net-yarn basis. Filament count does not multiply total yarn titre again; use weighing as the controlling net-delivery record and treat unsupported length conversion as a gap.
supplied_form	all inventory rows	Mass; Energy	kg; kWh; MJ	Whole commercial solutions/emulsions/pulp cross the boundary at actual supplied mass; active solute, cellulose and water are subledgers. Convert raw units before the single normalize_delivery operation. Integrate a rate over duration; never multiply already integrated volumes by time. Density, heating value and assay require independent actual-condition evidence, not an unrelated native property factor.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased wood dissolving pulp and complete commercial chemical formulations at receipt, with actual upstream cradle-to-supply burdens and inbound transport; historical opening WIP/stock carried explicitly
starting_condition_role	Foreground transformation plus finished-stock dispatch; upstream supply remains linked background
product_classification_scope	Artificial continuous filament single yarn only; do not expand to all CPC 35550 routes or CPC 35540 tow/staple
recursive_input_rule	Same-category returned/rework yarn retains its original process history and measured remaining burdens; count only new external purchases, cancel internal transfers and never regenerate accepted production by reinspection
upstream_dataset_requirement	Match actual supplied pulp/solution/finish/utility form, concentration, geography, technology, age and provider; generic reference identity is insufficient provider proof
disclosure	Declare allocation, stock/cohort method, conditioning basis, included auxiliary systems, external wastewater treatment and materiality exclusions; no default yield or recovery factor

rule_id	Rule	source_ids
boundary_route	Include all actual operations through dispatch, including pulp preparation, NaOH/CS2 chemistry, bath/wash/finish, evaporation/drying/winding, rejected runs, cooling, recovery, treatment, conditioning, warehouse dwell, packaging, handling and dispatch. Add separate atomic exchanges for any actually used auxiliary, fuel, refrigerant leak or packaging not listed; no silently omitted burden.	jrc-polymers-2007; enka-filament-products; enka-industrial-recovery
boundary_recovery	Measure CS2 condensation and any actual H2S scrubbing/CS2 adsorption, recovered press liquor, bath reconcentration, wash water and condensate as internal cycles with their real energy/material burdens. Retain inlet/outlet composition, losses and stock changes; no fresh purchase or exported credit for internal recovery. Alternative oxidation-to-acid treatment is outside this selected recovery configuration and requires explicit separate species/oxygen/water evidence.	jrc-polymers-2007
boundary_delivery	The terminal gate is actual net accepted delivery Q, not production release P. Finished inventory is a separate account. Keep opening/closing finished stock and historical burdens; undelivered stock is not in Q. Production release P is recorded once without adding the same batch closing finished stock as another production output. Consolidation cancels released_yarn/stock_yarn and other internal transfers, preserving all real warehouse/rework/dispatch burdens.	enka-filament-products
boundary_species	Close complete physical mass and C/S/Na/Zn balances on unnormalised actual production and warehouse ledgers independently of LCA burden allocation. Use measured inlet/outlet species and independently evidenced reaction extents, including actual neutralisation water where proven; do not infer actual species or reaction water from COD, total sulphur, assumed yields or a closure residual. Distinguish free/retained/structural water and phase changes from chemical formation/consumption.	jrc-polymers-2007

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
viscose_line	Integrated viscose filament production and recovery	required	Selected continuous xanthate wet-spinning route; actual auxiliary configurations declared	manufacturing; internal P transfer	Raw P kg newly released, not terminal Q
dispatch	Conditioned stock, packaging and actual dispatch	required	Same route/grade/cohort with full opening/closing stock history	terminal supply gate	1 kg net delivered reference flow

Process: Integrated viscose filament production and recovery (viscose_line)

Inputs

Product flows

Dissolving pulp supply (wood_pulp)

Record the complete purchased pulp sheet mass as supplied, its dry solids, cellulose assay, moisture and transport. Dry cellulose and water are composition subledgers, not additional purchases; do not substitute polymer resin or purchased staple yarn.

• Selected flow: Wood dissolving pulp
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007; enka-filament-products

Fresh caustic supply (caustic_solution)

Use full purchased solution mass and actual NaOH assay for alkalisation, dissolution and gas scrubbing. Recovered press liquor is an internal circulating stream; retain its measured mass, composition, stock and recovery burdens without charging fresh purchase twice.

• Selected flow: Aqueous sodium hydroxide solution
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007

Fresh xanthation reagent (carbon_disulphide)

Separate newly purchased CS2 from recovered CS2 returned to xanthation. Record liquid mass, purity, tank changes and route. Recovery is not an avoided virgin-product credit.

• Selected flow: Liquid carbon disulphide
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007

Spinning bath acid makeup (sulphuric_acid)

Record whole supplied sulphuric acid solution, assay and carrier water. Actual bath composition and neutralisation extent need independent analytical evidence; do not infer acid identity from the ambiguous Hydrogene Sulphate label in the manufacturer comparison table.

• Selected flow: Aqueous sulphuric acid solution
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007; enka-consumption-context

Bath salt makeup (sodium_sulphate)

Include only actual externally acquired anhydrous Na2SO4 makeup; record purity. Internally formed or recovered sodium sulphate stays in the circulation ledger; no duplicate purchased salt or generic yield is assumed. A different supplied hydrate requires its own explicit row.

• Selected flow: Anhydrous sodium sulphate
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007

Zinc bath additive (zinc_sulphate)

Record the complete acquired solution and ZnSO4/Zn assays, water and supplier form; do not treat zinc-element mass as the purchased formulation. If mixed onsite, replace this purchase with each actual acquired ingredient and retain blending energy/losses.

• Selected flow: Aqueous zinc sulphate solution
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007; enka-consumption-context

Desulphurisation solution (sodium_sulphide)

Conditional on actual use in filament washing/desulphurisation; retain whole supplied mass, assay and bath losses. The staple-fibre example is not evidence that every filament line uses this reagent; documented absence is required for zero.

• Selected flow: Aqueous sodium sulphide solution
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007

Filament spin finish (spinfinish_emulsion)

One actual purchased commercial finish emulsion, with supplier identity, complete formulation mass, active content, carrier water, retained finish and wash-off records. Constituents are subledgers, not repeat purchases; onsite blending instead records each acquired ingredient and actual mixing burdens.

• Selected flow: Aqueous viscose-filament spin-finish emulsion
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007; enka-consumption-context

Conditional filament bleaching (hypochlorite_solution)

Only if actually used for the declared undyed bright yarn. Keep purchased solution mass and active chlorine assay; the ENKA comparison gives no basis to impose a positive rate, and its BREF comparator shows zero.

• Selected flow: Aqueous sodium hypochlorite solution
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007; enka-consumption-context

Purchased process water (process_water)

Meter fresh external process water once. Formulation carrier water, pulp moisture, condensate and recovered wash water are separate composition/circulation records; an already integrated volume is not multiplied by duration.

• Selected flow: Process water
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_utilities.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities
• Sources: jrc-polymers-2007

Line and recovery electricity (electricity_line)

Include actual preparation, filtration/vacuum, continuous spinning, washing, drying, winding, gas/liquid recovery, cooling and effluent pretreatment electricity, including failed runs and standby attributable to the cohort. Retain submeter transfers without duplicating utility totals.

• Selected flow: Electricity
• Flow property / unit: Energy / kWh
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_utilities.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities
• Sources: jrc-polymers-2007; enka-industrial-recovery

Purchased line and recovery steam (steam_line)

Collect net supplied steam energy at actual pressure/temperature and condensate return, separately from electricity. Include evaporation, drying and adsorbent regeneration if used. ENKA Obernburg CHP is a specific source example, not a universal provider.

• Selected flow: Process steam
• Flow property / unit: Energy / MJ
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_utilities.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities
• Sources: jrc-polymers-2007; enka-industrial-recovery

Gas recovery adsorbent replacement (activated_carbon)

Conditional on an actual CS2 adsorption polishing unit after appropriate H2S removal. Include acquired replacement carbon, regeneration steam and losses. No fixed recovery efficiency or universal adsorption installation is imposed.

• Selected flow: Activated carbon
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007

Conditional zinc precipitation reagent (lime_slurry)

Only for actual onsite zinc precipitation before wastewater transfer. Record whole purchased slurry and solids; separately acquired onsite ingredients replace the slurry purchase. Do not apply reference-plant pH, removal or sludge rates.

• Selected flow: Calcium hydroxide slurry
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_materials.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: jrc-polymers-2007

Conditional salt drying fuel (dryer_natural_gas)

Include actual gas use if recovered salt is directly fuel-dried onsite. Preserve measured integrated volume, reference pressure/temperature and independently supported heating value; a flow property coefficient is not gas density. Purchased steam does not include this direct fuel twice.

• Selected flow: Natural gas
• Flow property / unit: Energy / MJ
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_utilities.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities
• Sources: jrc-polymers-2007

Outputs

Product flows

Newly released yarn transfer P (released_yarn)

Actual newly quality-released single continuous viscose yarn transferred to finished stock; report P and its full carried exchange vector, not delivery Q. Reinspection of returned yarn is not new P. The native identity is finished manufactured product, production mix at plant, with no CAS, geography/locationOfSupply, fixed grade, titre or supplier specified; it does not establish ENKA provenance. Use only the declared undyed bright xanthate-route yarn, not staple yarn, resin, sewing thread, multiple/cabled or retail yarn.

• Selected flow: Artificial filament yarn (except sewing thread and multiple or cabled yarn), not put up for retail sale af18d089-ed9e-4dd9-b3e3-5f5decb6c61b
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_release.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_release
• Sources: jrc-polymers-2007; enka-filament-products

Conditional saleable recovered salt (recovered_salt)

Only actual externally supplied dry anhydrous Na2SO4 after recovery and drying; measure moisture/purity and all separation/drying burdens. Glauber-salt crystallisation is not proof of this final dry form. If sold as decahydrate, use a separate correctly specified hydrate row and structural-water ledger, never this row or a guessed conversion.

• Selected flow: Recovered anhydrous sodium sulphate
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Waste flows

Wastewater to external treatment (wastewater_transfer)

Record the actual transferred aqueous stream mass, water fraction, dissolved sulphate, zinc, residual CS2/H2S and measured organics with receiver/treatment burdens. COD is a quality indicator, not an emitted chemical mass. Do not also report the external works final emissions as direct plant emissions.

• Selected flow: Viscose-process wastewater
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Conditional onsite zinc sludge (zinc_sludge)

Only if actually generated onsite; retain wet mass, dry solids, zinc speciation and receiver. The sludge mixture is one physical waste stream, not purchased ZnSO4 or saleable zinc; include dewatering and actual treatment.

• Selected flow: Zinc-bearing wastewater-pretreatment sludge
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Cellulose filtration residue (pulp_filter_residue)

Record one actual dope-filter residue stream with cellulose, liquor and contamination assays plus treatment; no residual mass is invented to close the balance.

• Selected flow: Viscose-dope filtration residue
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Discarded viscose yarn (waste_yarn)

Include spinning breaks, unrecoverable off-grade output and failed-run waste on the same conditioned mass basis; trace any rework separately. Rework retains earlier burdens and is not both waste export and recovered product.

• Selected flow: Discarded viscose filament yarn
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_release.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_release
• Sources: jrc-polymers-2007

Spent recovery adsorbent (spent_carbon)

Conditional actual replacement waste; retain sorbed sulphur compounds, moisture, destination and treatment. Internal steam regeneration is not a fresh-carbon purchase or a waste export.

• Selected flow: Spent CS2-recovery activated carbon
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Elementary flows

Residual CS2 to air (cs2_air)

Measure residual post-control and fugitive CS2 by concentration and matched actual gas volume or integrate rate over time; do not count captured gas recycled internally as an atmospheric emission. Distinguish CS2 mass from mass expressed as S.

• Selected flow: Carbon disulphide to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Residual H2S to air (h2s_air)

Use independently measured actual residual H2S; do not infer it from total sulphur, COD, CS2 feed loss or a mass closure residual. Preserve the abatement inlet/outlet and scrubber transfer subledgers.

• Selected flow: Hydrogen sulphide to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Actual evaporated water (water_vapour)

Separate actual evaporated water from retained fibre moisture, supplied carrier water, condensate, structural water in salts and independently evidenced chemical reaction water. Unknown reaction water and unknown evaporation cannot both be fitted to one residual.

• Selected flow: Water vapour to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Fossil carbon dioxide to air (dryer_co2)

Conditional on actual onsite combustion; collect this actual species independently with gas analysis/validated fuel-specific balance, including units and abatement. Do not label a total NOx or total sulphur measurement as this species without supported conversion/speciation.

• Selected flow: Fossil carbon dioxide to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Sulphur dioxide to air (dryer_so2)

Conditional on actual onsite combustion; collect this actual species independently with gas analysis/validated fuel-specific balance, including units and abatement. Do not label a total NOx or total sulphur measurement as this species without supported conversion/speciation.

• Selected flow: Sulphur dioxide to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Nitrogen monoxide to air (dryer_no)

Conditional on actual onsite combustion; collect this actual species independently with gas analysis/validated fuel-specific balance, including units and abatement. Do not label a total NOx or total sulphur measurement as this species without supported conversion/speciation.

• Selected flow: Nitrogen monoxide to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Nitrogen dioxide to air (dryer_no2)

Conditional on actual onsite combustion; collect this actual species independently with gas analysis/validated fuel-specific balance, including units and abatement. Do not label a total NOx or total sulphur measurement as this species without supported conversion/speciation.

• Selected flow: Nitrogen dioxide to air
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_recovery
• Sources: jrc-polymers-2007

Process: Conditioned stock, packaging and actual dispatch (dispatch)

Inputs

Product flows

Released yarn received for stock (stock_yarn)

Receive the same physical P transfer as released_yarn with the same full carried burdens; cancel both internal transfer sides on consolidation. Opening finished stock has actual historical route/grade/state-matched exchange vectors; it is not burden-free. Native identity is generic finished manufactured product, production mix at plant, no CAS, geography/locationOfSupply, fixed grade, titre or supplier. It establishes neither supplier nor ENKA geography.

• Selected flow: Artificial filament yarn (except sewing thread and multiple or cabled yarn), not put up for retail sale af18d089-ed9e-4dd9-b3e3-5f5decb6c61b
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_delivery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_delivery
• Sources: enka-filament-products; jrc-polymers-2007

Industrial winding tube (paper_tube)

Record actual tube mass and reuse turns/returns. Tube tare is excluded from yarn Q but its manufacture and allocated replacement burdens are included.

• Selected flow: Paperboard winding tube
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

Shipping carton (carton)

One actual industrial transport carton, weighed separately from yarn and other packaging. This does not turn the yarn into retail put-up.

• Selected flow: Corrugated fibreboard shipping carton
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

Protective film (polyethylene_film)

Record actual polyethylene film mass and losses separately; packaging is never part of net yarn delivery mass.

• Selected flow: Polyethylene packaging film
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

Conditioning storage and handling electricity (electricity_dispatch)

Include actual conditioning, warehouse dwell, winding/packing if done here, internal electric handling, inspection, returns/rework and dispatch electricity. Reconcile line/warehouse meter boundaries to prevent deletion or duplication.

• Selected flow: Electricity
• Flow property / unit: Energy / kWh
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products; enka-industrial-recovery

Outputs

Product flows

Actual accepted industrial delivery Q (delivered_yarn)

Terminal reference: actual unique positive net delivered single undyed bright viscose continuous-filament yarn at the dispatch gate, excluding tare and undelivered stock. Q is not newly released P. Count a returned and reshipped physical quantity once after acceptance. Native name comprises finished product manufactured and production mix at plant; no CAS, geography/locationOfSupply, fixed route/grade, titre or supplier is specified. This generic identity alone does not prove a provider, ENKA source or a specific conditioning regime. Declare the xanthate wet-spun route, single industrial non-retail form, measured titre/filament count, finish and moisture.

• Selected flow: Artificial filament yarn (except sewing thread and multiple or cabled yarn), not put up for retail sale af18d089-ed9e-4dd9-b3e3-5f5decb6c61b
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: fixed_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: identity_reference
• Collection protocol: cp_delivery
• Sources: jrc-polymers-2007; enka-filament-products

Waste flows

Discarded stock yarn (dispatch_waste_yarn)

Actual damaged or rejected warehouse/dispatch yarn sent to treatment, separate from recoverable returns/rework and closing stock; retain carried burdens and treatment.

• Selected flow: Discarded viscose filament yarn
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

Discarded packaging film (waste_film)

Actual film trim and damaged film with receiver/treatment, not combined with paper wastes.

• Selected flow: Discarded polyethylene packaging film
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

Discarded paperboard (waste_paperboard)

Record carton waste separately; a different paper-tube waste stream must receive its own row when generated.

• Selected flow: Discarded corrugated fibreboard
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

Discarded winding tubes (waste_tube)

Actual non-returnable damaged paper tubes with reuse history and receiver; keep separate from cartons and returned reusable tubes.

• Selected flow: Discarded paperboard winding tube
• Flow property / unit: Mass / kg
• Amount rule: Attribute the raw quantity to this delivered cohort, then divide once by actual positively accepted net delivered yarn kg; cp_dispatch.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_dispatch
• Sources: enka-filament-products

7. Allocation and Co-product Handling

rule_id	Rule	source_ids
allocation_internal	Recovered CS2, liquor and wash water reused inside the boundary receive no avoided-production credit; retain all recovery burdens and cancel internal exchanges on consolidation.	jrc-polymers-2007
allocation_salt	First separate actual salt-recovery/finishing-specific burdens and any other independently produced coproduct. For remaining common burdens document the defensible physical relationship; if none is established, use transparent contemporaneous market-value shares at the common process gate for actual marketable outputs with sensitivity analysis. Do not impose a numeric split, claim substitution, allocate to internal cycles or label untreated waste as a coproduct.	jrc-polymers-2007; enka-industrial-recovery; ilcd-attributional-allocation-2010

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_materials	viscose_line	Whole supplied materials and internal recovery subledgers	receipt, weighbridge, tank and assay records	lot; supplier; supplied mass; assay; carrier water; pulp dry solids; opening/closing chemical tanks; internal recovered amount and composition; failed runs; WIP masses and historical exchange vectors	Owner: production materials accountant with laboratory verification. Collect unnormalised actual period receipts/consumption/stock changes and complete formulation masses for every matched campaign, including failed/zero-release runs and rework. Keep assays and water as composition subledgers; collect internal streams and carried WIP burdens separately. Do not divide by P or Q during collection.	kg	each batch and reconciled reporting period	complete matched production campaigns plus opening WIP history	actual production plant and suppliers, separately identified	per 1 kg reference flow	calibrated weights; invoices; CoA; tank reconciliation; batch genealogy
cp_utilities	viscose_line	Actual line and auxiliary utility burdens	meter and operating logs	operation/submeter; raw electricity; steam flow/enthalpy; condensate; integrated gas volume or rate series; reference temperature/pressure; independent density/heating value; timestamps; failed-run/standby loads; WIP burden vectors	Owner: utilities engineer. Retain each unnormalised energy/volume numerator across production, vacuum, washing/drying, cooling, recovery, effluent pretreatment and any coproduct drying. Keep gross supply/returns and submeter reconciliation; collect actual failed/zero-output and rework energy plus opening/closing WIP carry. No collection-side normalization.	kWh; MJ; m3	continuous meters; whole matched campaign	same production/WIP intervals as cp_materials	actual utility boundary and provider; no default ENKA CHP	per 1 kg reference flow	meter calibration; energy invoices; temperature/pressure; condensate and utility balance
cp_release	viscose_line	New acceptance P and production/WIP genealogy	quality release and rejected-batch ledger	unique lot/package; actual P net kg; failed/rejected run; return/rework origin; conditioning T/RH/time; moisture; finish; titre; filament count; tube tare; opening/closing WIP quantities and exchange vectors	Owner: quality release officer. Weigh accepted new yarn net of tare at the declared conditioning basis and retain complete failed/off-grade records. Track recovered/reworked material through original IDs; returned yarn reinspection is not new P. Collect unnormalised P, all WIP masses, original carried burdens and internal transfer receipts, without adding closing finished stock to P or dividing by Q.	kg; dtex	each release/rejection; reconciled period	complete campaigns including zero-positive-output periods	same manufacturing line and physical package IDs	per 1 kg reference flow	signed quality release; calibrated net weights; moisture/finish tests; full reject genealogy
cp_recovery	viscose_line	Recovery, coproducts, actual species and environmental exits	stream assay, gas monitoring and transfer notes	stream ID; raw mass/volume; gas flow and species concentrations; CS2/H2S separately; C/S/Na/Zn assay; wastewater composition; COD as indicator; salt hydrate/purity; sludge solids; free/structural water; independently evidenced reaction extents/water; opening/closing recovered-stream stocks; receiver	Owner: environmental/recovery engineer with analytical laboratory. Collect unnormalised inlet/outlet/recycle masses, actual species and water evidence independently, including abatement consumables, energy, wastes and external treatment burdens. Use concentration times matched integrated volume or rate integration with stated gas conditions; no extra duration factor on integrated volume. Do not infer reaction water or an unknown exit from a second unknown closure.	kg; m3; mg/m3	matched sampling/continuous monitoring and each transfer	all matched campaigns, upset periods and recovery stock history	actual collection/recovery units and effluent receivers	per 1 kg reference flow	sampling/QC; calibration; actual reaction/species evidence; elemental/water closure; receiver treatment receipt
cp_delivery	dispatch	Actual unique supplied Q and finished-stock carry	dispatch/acceptance and finished-stock genealogy	physical lot/package; P receipt; gross shipments G; accepted returns R; unique accepted net delivered Q; opening/closing finished kg; carried exchange vectors; stock withdrawal/scrap; conditioning/moisture/finish; package tare	Owner: dispatch controller with stock accountant and customer acceptance records. Collect unnormalised actual deliveries/returns, opening/closing stock masses and historical exchange vectors matched to this route/grade/state. Weigh net yarn excluding all tare; distinguish shipment event from unique accepted physical output and do not count repeated reshipments twice. Retain P separately; do not assume P equals Q or treat undelivered stock as delivery. Returns restore the original carried burden and correct the original accepted-supply cohort when already counted; subsequent reinspection/reshipment is never a second positive output. No collection-side division.	kg	each dispatch/acceptance/return and opening/closing stocktake	declared actual delivery cohort and all preceding carried production/stock periods	producing-site dispatch gate; route/grade/state matched stock	per 1 kg reference flow	dispatch acceptance; calibrated tare/net record; returns/stock reconciliation; historical burden provenance
cp_dispatch	dispatch	Warehouse packaging handling returns and dispatch burdens	meters, package receipts and dwell/handling logs	actual carton/tube/film mass; tube reuse and returns; stock dwell; conditioning energy; handling energy; dispatch energy; failed dispatch/rework; packaging wastes and receivers; opening/closing burden vectors; opening/closing empty and attached-to-WIP/finished-stock packaging kg by article; packaging kg leaving with gross physical shipments; external reusable-packaging returns received/sent kg	Owner: warehouse operations engineer. Collect complete unnormalised actual packaging, storage, conditioning, handling, returns/rework and dispatch burdens for matched stock histories, including failed deliveries. Split each physical material/fuel/waste and actual provider separately. Keep allocation to dispatched versus closing stock explicit; do not delete incurred loads or divide during collection. Keep a separate physical ledger for each packaging article: opening empty/attached stock plus external receipts and returns received equals closing empty/attached stock plus packaging carried out with gross physical shipments, reusable packaging sent back outside and actual waste. Cancel internal reuse transfers. Use independently weighed article/tare masses and traced package IDs; associated packaging outflows are neither extra yarn Q nor automatically coproducts. Keep these physical quantities separate from allocated burden vectors.	kg; kWh; MJ	each operation and complete inventory interval	same delivered/closing-stock cohorts as cp_delivery	actual warehouse and dispatch equipment; no downstream external distribution	per 1 kg reference flow	package weights; energy/dwell logs; allocation reconciliation; waste treatment receipts

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
match_cohort	all inventory rows	Build raw attributable exchange vectors before normalization: released-production burdens carry opening WIP plus complete actual-period inputs/loads including failed and rework runs, less closing WIP carried to future production, with actual coproduct allocation. Delivery burdens carry opening finished-stock exchange vectors plus new released vectors plus actual warehouse/packaging/handling/returns/dispatch loads, less closing finished-stock carried vectors and separately traced other destinations. Cancel internal P and recycle transfers; do not sum the same inherited vector twice. Physical raw stock reconciliation is separate: opening finished mass + new P + physical return receipts + independently measured moisture/finish gains = gross physical dispatch + closing finished mass + actual scrap/other exits + independently measured moisture/finish losses. Reconcile all terms on the declared component/conditioning basis; document uncertainty without inventing a residual water exchange; Q is unique positively accepted net supply from those events, not automatically gross dispatch or P.	opening_wip_vectors; raw_period_vectors; closing_wip_vectors; opening_finished_vectors; new_released_vectors; dispatch_vectors; closing_finished_vectors; other_destinations; cp_release; cp_delivery	attributable_raw_vectors	jrc-polymers-2007; enka-filament-products; enka-industrial-recovery
normalize_delivery	all inventory rows	For each external exchange, divide the matched attributable raw amount from match_cohort by actual positive accepted delivered net yarn mass Q in kg, exactly once, after raw unit conversions. The inventory amount expression and collection aggregation reference this same reporting operation, not sequential divisions. Terminal delivered_yarn is Q/Q = 1 kg; released_yarn and stock_yarn retain equal measured P transfer quantities per the same Q and cancel on consolidation. If Q is zero, report the failed/stock-building interval and carry its burdens to the eligible cohort; never divide by zero or silently discard it.	attributable_raw_vectors; Q; cp_delivery	exchange amount per 1 kg reference flow	enka-filament-products
physical_species_water	viscose_line; dispatch	Reconcile complete unnormalised stream masses and C/S/Na/Zn separately from LCA allocation. Track cellulose solids, solutes, moisture, finish, recovered streams, wastewater, residues, actual gas species and stocks. Free water, condensate, evaporation and Na2SO4 hydrate crystal water are separate from net chemical water. Reaction-water formation/consumption requires independent actual chemistry, assays and reaction-extent evidence; no mandatory numeric amount or closure-derived species. A stated analytical uncertainty remains a gap, not an invented sink.	raw_stream_masses; elemental_assays; actual_species; independently_evidenced_reaction_extents; cp_recovery; cp_release; cp_delivery	raw physical reconciliation and unresolved uncertainty	jrc-polymers-2007

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
identity_basis	reference and all stock	Same viscose route, undyed bright grade, single continuous-filament construction, conditioning/moisture/finish and supply gate across both languages and every accepted cohort; no substituted staple yarn, polymer or generic mixed route.	CoA; route declaration; net weights; native limitations in cards
complete_carry	all inventory rows	Retain raw actual periods, failure/zero-output, WIP and finished-stock mass/exchange-vector carry, returns/rework, positive unique Q and P separately; inability to substantiate historical stock burdens prevents a complete delivered dataset.	cp_materials; cp_utilities; cp_release; cp_delivery; cp_dispatch
source_limits	evidence and providers	JRC 2007 process examples and ENKA product/2023 comparison establish bounded technical context, not current inventory values or a complete same-SKU dataset. Declare current plant/provider/geography and all deviations. No BREF batch/integrated wash range, ENKA tick or hypothetical environmental claim becomes a measured exchange.	primary source scope; current foreground records; supplier matching
species_closure	recovery and physical ledgers	Verify all gas/liquid environmental outlets, independent actual species and reaction-water evidence, elemental balance and treatment destination; no COD-to-organics or residual fit. Do not duplicate external wastewater treatment emissions.	cp_recovery; analytical QA; treatment receipts

9. Validation Rules

rule_id	Rule	source_ids
validate_scope	Confirm single continuous viscose xanthate yarn and the declared actual delivery gate; reject excluded routes/forms and missing qualifiers. Generic native identity does not establish factory or supplier compatibility.	jrc-polymers-2007; enka-filament-products
validate_mass_stock	Check P/Q distinction, full WIP/finished-stock carried vectors, complete failed/rework loads, unique positive accepted delivery and tare/moisture/finish consistency. Reinspection/reshipment cannot create new production or duplicate Q; no closing finished stock is added as production output.	enka-filament-products
validate_normalization	Check raw unit conversion, match_cohort and one normalize_delivery operation only. Reject a second division, unsupported density/heating value, double-counted formulation constituents, copied yields or unsupported gas integration. All applicable measured amounts and actual optional auxiliaries must be present before dataset use.	jrc-polymers-2007
validate_physical	Check unnormalised mass/element/species/water closure independently of allocation and normalization, with real outlets and separate recovery stocks. Unknown reaction water and unknown outlet cannot share a fitted residual; retain and resolve material uncertainty.	jrc-polymers-2007

10. Published Dataset Profile

Field	Value
dataset_role	foreground production-and-dispatch inventory
downstream_use	secondary_dataset; background_dataset
allowed_use	Supplier-matched delivered single viscose continuous-filament yarn for downstream textile modelling after completeness checks
excluded_use	Retail winding, folded/cabled yarn, sewing thread, tow/staple, lyocell/acetate/cupro, synthetic yarn, tyre cord, generic all-artificial yarn average; no claim of methodology approval
required_metadata	Actual plant/geography, route/grade/titre/filaments, conditioning/moisture/finish, net delivery Q and separate release P, stock and WIP genealogy, reporting cohorts, providers, allocation and source dates
required_quality_disclosure	Measurement uncertainty, historical carried burdens, missing auxiliary UUID/provider matches, evidence limits, actual optional operations, physical balance gaps and incomplete scope
update_trigger	Route, product state, conditioning, provider, recovery/treatment, supply gate, stock attribution or source evidence changes

11. Data Sources

source_id	type	reference	used_for
jrc-polymers-2007	official_guidance	European Commission, August 2007, Reference Document on Best Available Techniques in the Production of Polymers, §§11.2.1/11.2.3/11.3, Figure 11.1, §§12.7.2–12.7.7. https://bureau-industrial-transformation.jrc.ec.europa.eu/sites/default/files/2019-11/pol_bref_0807.pdf	Industrial xanthate filament route, no staple-cut substitution, bath chemicals, recovery, gas/liquid outlets, salt and zinc treatment. Historical example concentrations, rates, recovery efficiencies and washing ranges are not defaults; separate actual species/water evidence is required.
enka-filament-products	literature	ENKA, Viscose filament yarns, manufacturer product page. https://www.enka.de/en/products/	Primary commercial continuous-filament yarn, titre/filament distinctions and textile use. Product family is not a measured SKU, full recipe or conditioning/moisture/finish/tare specification; catalogue examples are not numeric constraints.
enka-industrial-recovery	literature	ENKA, Sustainability, production and recovery sections. https://www.enka.de/en/sustainability/	Primary wood-pulp conversion, material cycles, salt coproduct, wastewater treatment and energy context. Swedish pulp/Domsjö supply and Obernburg CHP describe that supply chain only, not generic plant geography/provider or zero-carbon proof. No generic recovery factor, allocation or reaction-water rate.
enka-consumption-context	literature	ENKA, Consumption & emission values, 24 October 2024; data 2023, one-page table and footnotes 1–3. https://www.enka.de/wp-content/uploads/2024/10/ENK_1825_20241024_Consumption-Emission-values.pdf	Industrial spin finish, zinc and washing counterevidence. BREF comparator is batch washing; ENKA cells are qualitative ticks, with higher-zinc and proprietary-washing exceptions. Ambiguous Hydrogene Sulphate is not acid identity evidence. No table number/tick is copied as a foreground amount, yield or QA range.
ilcd-attributional-allocation-2010	official_guidance	European Commission JRC, ILCD Handbook: General guide for Life Cycle Assessment - Detailed guidance, first edition March 2010, section 7.9.3, printed pp.257-258 (PDF pp.277-278). https://eplca.jrc.ec.europa.eu/uploads/ILCD-Handbook-General-guide-for-LCA-DETAILED-GUIDANCE-12March2010-ISBN-fin-v1.0-EN.pdf	Attributional allocation method only: separate specific burdens, determining physical causality before residual common-process-gate market value. No viscose factor, fixed share, substitution credit, waste cutoff or recipe.