Magnetic media, not recorded, except cards with a magnetic stripe

1. Scope and Applicability

This PCR produces foreground manufacturing data for unrecorded magnetic recording media: tape in rolls, cassettes or cartridges and flexible magnetic disks. Exclude hard-disk drives, optical media, solid-state memory, recorded content and magnetic-stripe cards. The current CPC title is verified against un-cpc-3-0-structure-2025; detailed inclusions and exclusions use the explicitly historical un-cpc-2-1-magnetic-media-note.

The representative route is particulate coating on polymer film, followed by drying and finishing. The barium-ferrite pigment and polyester-urethane binder cards are conditional examples, not a mandatory combined recipe. A concrete dataset must use its actual formulation. Metal-evaporated tape, different pigments, substrates or binders require a documented route adaptation with separate atomic exchanges, measured yields and energy. Do not apply coating defaults to deposition. Manufacturing-specific solvent reconciliation, format-qualified accepted yield, and recursive coated-web inputs justify this distinct methodology.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.radio-television-and-communication-equipment-and-apparatus.magnetic-media-not-recorded-except-cards-with-a-magnetic-stripe
classification_refs	CPC 3.0 47530
covered_products	Unrecorded flexible magnetic tape and disks, including integral cassette/cartridge assemblies.
excluded_products	Hard-disk drives; optical and solid-state media; recorded media; magnetic-stripe cards; storage services.
representative_product	One specified unrecorded particulate-coated magnetic tape format at factory gate.
production_route	Purchased film and formulation ingredients → dispersion/coating → drying → calendering/slitting → testing and packing; purchased coated-web finishing is conditional.
market_state	New, accepted, unrecorded medium; declare bulk roll, bare disk or assembled cassette/cartridge separately.

3. Reference Flow

Field	Value
What	Supply of one declared magnetic recording medium ready for subsequent recording.
How much	1 kg net accepted medium at factory gate; integral housing included only for an assembled product; shipping packaging excluded.
How well	Meets declared format, dimensions, magnetic/read-write acceptance tests and blank-state specification; native capacity or recording duration is supplementary, never assumed from mass.
How long or cycle	One manufacturing delivery; no assumed archival lifetime, reuse count or storage-service duration.
reference_flow_link	reference_product

Field	Value
Reference amount	1
Reference product flow	Magnetic media, not recorded, except cards with a magnetic stripe 40bcd8b1-541d-4314-9e57-fc1250fd692e
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	format and intended recording function; bulk/bare/assembled state; net mass and packaging boundary; film polymer and thickness; pigment and binder formulation; tape width and length or disk dimensions; native uncompressed capacity or recording duration with test conditions; blank-state definition including any factory servo information; acceptance tests and rejected yield; coating/deposition/finishing route; site, geography and reporting period; solvent capture/recovery/destruction system; upstream boundary.

Declare every required qualifier in the foreground package. Mass normalization does not establish functional equivalence between formats or storage capacities.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
net_mass	Accepted product	Mass	kg	Use measured accepted net mass M, separating integral housing from removable shipping packaging. Convert counts with measured same-format mean mass; film area uses measured areal mass.
formulation_basis	Coating ingredients	Mass	kg	Record each polymer, pigment and solvent separately; reconcile wet deliveries with measured solids/composition and inventory changes. Do not record both a supplied solution and all its constituents as additional inputs.
energy_conversion	Electricity and gas	Energy; Volume	MJ; m3	Electricity: 1 kWh = 3.6 MJ exactly. Gas volume must declare temperature, pressure, dry/wet state and any volume correction; use supplier calorific value only when converting gas to energy.
solvent_species	Solvent balance	Mass	kg	Use species mass, not total VOC mass, for each solvent input and emission. Convert concentration and exhaust volume to a common temperature, pressure and moisture basis.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Receipt of film, formulation constituents and components, or purchased coated magnetic web, at the declared manufacturing site.
starting_condition_role	Foreground gate-to-gate manufacturing entry; supplier production remains upstream.
product_classification_scope	CPC 3.0 47530
recursive_input_rule	Purchased same-category coated web retains supplier output state and upstream dataset; trace once to the declared supplier boundary. Never link the final process back to itself or re-add purchased web ingredients in foreground.
upstream_dataset_requirement	Link representative supplier datasets for each purchased exchange and delivered energy; include delivery transport once, explicitly inside or outside supplier coverage.
disclosure	State integrated coating versus finishing-only, captured versus emitted solvent, internal recycling, outsourced operations, packaging, utilities and treatment boundaries; distinguish gate-to-gate results from linked cradle-to-gate results.

rule_id	applies_to	rule	source_ids
boundary_manufacturing	foreground	Include actual preparation, coating, drying, finishing and acceptance testing, with attributable cleanroom and solvent-management demand. For floppy disks use punching and the declared orientation treatment; do not assume the tape orientation step.	epa-ap42-magnetic-tape
boundary_solvents	solvent_control	Include storage, mixing, coating, cleaning, waste handling and recovery losses; distinguish internal captured solvent from final releases and exported waste.	epa-magnetic-tape-risk-review
boundary_extension	dataset_instantiation	The cards are a representative starting inventory. Reconcile against the actual recipe, utility meters, waste ledger and emissions permit: add each actual lubricant, crosslinker, pigment, packaging component, refrigerant leak and combustion pollutant as its own atomic exchange where present. Absence requires records; an omitted card is not a cut-off.	quantegy-magnetic-tape-components
boundary_downstream	lifecycle	Stop at dispatch of accepted blank media. Downstream recording, storage drives, data-centre operation and end-of-life require separate scenarios; no avoided storage-energy credit in manufacturing. Include external production-waste treatment through linked datasets.	un-cpc-2-1-magnetic-media-note

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
manufacture	Media coating and finishing	required	All datasets; actual route declared.	foreground production	1 kg accepted medium
utilities	Shared site utilities and direct carbon	required	All datasets; each absent exchange documented.	attributable support	Same accepted medium
solvent_control	Solvent recovery and final releases	conditional	Solvent-bearing coating, cleaning or recovered solvent is handled onsite.	waste and emissions accounting	Same accepted medium

Common meters are assigned once. Internal mix, coated-web transfers and recovered-solvent loops are process records, not additional purchases or avoided-product credits. Keep detailed operation meters in collection records.

Process: Media coating and finishing (manufacture)

Inputs

Product flows

Base web (pet_base_film)

inclusion_condition: PET web coated on site; exclude purchased coated-web mass.

• Selected flow: Polyethylene terephthalate base film
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: quantegy-magnetic-tape-components

Magnetic pigment (barium_ferrite)

inclusion_condition: Barium-ferrite particulate formulation only; record pigment grade and purity.

• Selected flow: Barium ferrite magnetic pigment powder
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: fujifilm-recording-media

Binder solids (polyester_urethane)

inclusion_condition: Only when this polymer is present; count dry resin separately from each solvent in a supplied solution.

• Selected flow: Polyester polyurethane binder resin
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: loc-magnetic-tape-binder-research

Backcoat carbon (carbon_black)

inclusion_condition: Carbon-black backcoat or conductive additive is actually used.

• Selected flow: Carbon black 104238ef-9017-45d1-a77e-556271cd3f60
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials

Fresh coating and cleaning solvent (mek_input)

inclusion_condition: MEK used for coating or cleaning; include solvent supplied in resin solutions; exclude internal recovery turnover.

• Selected flow: Methyl ethyl ketone
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_solvents and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_solvents
• Sources: epa-ap42-magnetic-tape

Fresh coating and cleaning solvent (toluene_input)

inclusion_condition: Toluene used for coating or cleaning; include solvent in supplied mixtures; exclude internal recovery turnover.

• Selected flow: Toluene
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_solvents and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_solvents
• Sources: epa-ap42-magnetic-tape

Purchased coated magnetic web (purchased_coated_web)

inclusion_condition: Finishing from purchased unrecorded coated web; specify roll state and omit upstream coating operations from foreground only.

• Selected flow: Magnetic media, not recorded, except cards with a magnetic stripe 40bcd8b1-541d-4314-9e57-fc1250fd692e
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: un-cpc-3-0-structure-2025

Purchased integral housing (cartridge_housing)

inclusion_condition: Tape cartridge assembled at this site; record housing bill of materials and supplier boundary.

• Selected flow: Empty plastic magnetic tape cartridge housing
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials
• Sources: epa-magnetic-tape-risk-review

Shipping box (corrugated_box)

inclusion_condition: Corrugated box crosses the dispatch boundary; packaging mass is excluded from reference product mass.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_materials and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_materials

Outputs

Product flows

Accepted unrecorded medium (reference_product)

inclusion_condition: Always; one declared format and delivery state per dataset.

• Selected flow: Magnetic media, not recorded, except cards with a magnetic stripe 40bcd8b1-541d-4314-9e57-fc1250fd692e
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Accepted output M / M = 1; retain measured M and format-specific rejected yield.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_output
• Sources: un-cpc-3-0-structure-2025

Waste flows

Coated web reject (coated_tape_trim)

inclusion_condition: Coated PET trim or rejected tape leaves the site for treatment; exclude internal rework.

• Selected flow: Waste magnetic-coated PET tape offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_waste and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_waste
• Sources: epa-ap42-magnetic-tape

Rejected coating solids (coating_sludge)

inclusion_condition: Discarded pigment/binder coating sludge; measure wet mass, dry solids and solvent content.

• Selected flow: Waste magnetic coating sludge
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_waste and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_waste
• Sources: epa-magnetic-tape-risk-review

Process: Shared site utilities and direct carbon (utilities)

Inputs

Product flows

Purchased electricity (electricity)

inclusion_condition: Always where purchased; include cleanroom, drying, finishing, testing, recovery and refrigeration demand once.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ; Units of energy 93a60a57-a3c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_utilities and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities

Combustion fuel (natural_gas)

inclusion_condition: Gas-fired drying, heating or oxidizer support fuel is used.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume 93a60a56-a3c8-22da-a746-0800200c9a66 / m3; Units of volume 93a60a57-a3c8-12da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_utilities and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities

Purchased process water (process_water)

inclusion_condition: Water supplied for cleaning, humidification or cooling makeup; count makeup rather than circulation.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_utilities and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_utilities

Outputs

Elementary flows

Direct fossil carbon dioxide (fossil_co2)

inclusion_condition: Onsite fuel combustion or oxidation of fossil solvent; include both carbon sources once; exclude upstream power emissions.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Apply carbon_balance to measured fuel and destroyed-solvent fossil carbon, then divide by M.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_carbon

Process: Solvent recovery and final releases (solvent_control)

Outputs

Waste flows

Discarded liquid solvent (spent_solvent)

inclusion_condition: This mixed spent-solvent stream is transferred for external recovery or treatment; record composition; separate sludge.

• Selected flow: Spent non-halogenated MEK-toluene coating solvent mixture
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_waste and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_waste
• Sources: epa-magnetic-tape-risk-review

Solvent-bearing aqueous effluent (recovery_wastewater)

inclusion_condition: Aqueous condensate or recovery water leaves for wastewater treatment; record water mass and individual dissolved solvents.

• Selected flow: Wastewater from magnetic tape solvent recovery
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Collect the attributable period quantity under cp_waste and divide by accepted output M using normalize.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_waste
• Sources: epa-magnetic-tape-risk-review

Elementary flows

MEK released to air (mek_air)

inclusion_condition: MEK is released after capture/control, including fugitive and cleaning sources.

• Selected flow: methyl ethyl ketone fe0acd60-3ddc-11dd-afc7-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Use cp_solvents species measurements or solvent_balance, with capture_control only as a non-additive alternative, then divide by M.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_solvents
• Sources: epa-ap42-magnetic-tape

Toluene released to air (toluene_air)

inclusion_condition: Toluene is released after capture/control, including fugitive and cleaning sources.

• Selected flow: Toluene
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Use cp_solvents species measurements or solvent_balance, with capture_control only as a non-additive alternative, then divide by M.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg net accepted medium of the declared format
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_solvents
• Sources: epa-ap42-magnetic-tape

7. Allocation and Co-product Handling

rule_id	applies_to	rule	source_ids
allocation_subdivision	shared_processes	Use cp_allocation to assign dedicated material and energy records directly. Allocate shared utilities with measured machine demand and run time; coating-line demand may use coated area and metered drying load when causal. Record the allocation driver and sensitivity. Mass-only allocation across different tape formats requires justification.
allocation_recovery	solvent_reuse	Internal solvent recovery reduces fresh solvent purchases but is neither a sale nor an avoided-product credit. Record recovery burdens and external recovered-solvent exports separately; if exports have a product function, add a specific product exchange and document the treatment/allocation convention without an automatic substitution credit.	epa-ap42-magnetic-tape
allocation_rejects	accepted_yield	All production and rework burdens remain with accepted output M. Track rejected coated film and coating sludge separately; no negative raw-material input for scrap. Document any external recycling allocation explicitly.

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_output	manufacture	Accepted reference medium	Batch acceptance record	format; batch_id; gross_mass; tare_mass; housing_mass; accepted_count; rejected_mass; tape_area; native_capacity; test_method; blank_state	Calibrated weighing and format-specific release test	kg; m2; count	Each batch	All batches in declared reporting year or disclosed representative campaign	Manufacturing and dispatch site	Sum accepted net mass M by format; retain rejected mass and test failures	Scale calibration, product specification, release certificate
cp_materials	manufacture	Each material and component	Stock and batch ledger	row_id; supplier; grade; opening_stock; receipts; closing_stock; returns; dry_fraction; composition; area; component_mass	Weighing, warehouse reconciliation, supplier composition records	kg; m2	Each receipt and batch; period stocktake	Same period as cp_output	Declared site plus named component suppliers	Consumption = opening + receipts - closing - returns; separate each constituent; normalize by M	Invoices, SDS, bill of materials, supplier scope and balance closure
cp_solvents	solvent_control	MEK and toluene individually	Species solvent ledger and emissions records	species; fresh_input; opening_stock; closing_stock; recovered_internal; exported_solvent; waste_species_mass; residual_in_product; destroyed_mass; exhaust_flow; concentration; capture_fraction; destruction_fraction; uptime	Composition analysis, mass meters, matched stack concentration/flow measurements, leak survey	kg; kg/m3; m3	Each batch ledger; representative operating and upset emission tests	Same production period; align purchases, stocks and waste shipments	All solvent-handling areas and control outlets onsite	Species balance or measured emissions / M; do not treat internal recovery as an external loss	Analytical calibration, capture tests, control uptime, inventory reconciliation
cp_utilities	utilities	Electricity, gas and makeup water separately	Submeter records	meter_id; opening_reading; closing_reading; unit; gas_temperature; gas_pressure; water_density; operation_hours; allocation_fraction; supplier_boundary	Read calibrated submeters; reconcile to invoices	MJ; kWh; m3; kg	Shift or continuous readings; monthly reconciliation	Same period as cp_output, including startup and downtime loads	All attributable production and support equipment	Net attributable meter differences / M after documented conversion	Meter calibration, bills, allocation evidence
cp_waste	manufacture	Each discharged waste stream	Waste transfer record and analysis	row_id; wet_mass; dry_solids; solvent_species_fraction; destination; treatment; opening_stock; closing_stock; internal_rework	Weigh each stream and analyse representative composition	kg	Each shipment; samples covering recipe changes	Same period; correct temporary waste storage changes	Site outlet and receiving treatment operator	Generated and transferred quantities reconciled; each stream / M; water and solvent fractions remain within its wet mass	Transfer documents, laboratory results, treatment identity
cp_carbon	utilities	Direct fossil carbon dioxide	Fuel and solvent carbon record	fuel_carbon; oxidized_solvent_carbon; fossil_fraction; unoxidized_carbon; stack_co2; carbon_in_co; reporting_period	Fuel composition and solvent destruction analysis, cross-check stack measurement	kg C; kg CO2	Matched production campaigns and fuel changes	Same period as cp_output	Onsite combustion and solvent oxidation	CO2 from oxidized fossil carbon using molecular mass ratio; divide by M	Composition certificates and closed carbon balance
cp_allocation	utilities	Shared burden assignment	Production scheduling and meter attribution	equipment_id; product_format; run_hours; measured_power; coated_area; drying_load; allocation_driver; allocated_fraction	Join production logs with shared meter totals	h; m2; MJ; fraction	Each campaign; period reconciliation	Same period as cp_output	Shared equipment and control systems	Fractions sum to unity for shared burden; retain unattributed load and investigate	Causal driver justification and sensitivity result

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize	All rows	q_i = attributed period quantity_i / M; M > 0. Reference output = M/M = 1 kg/kg. Keep period totals and allocation fractions.	cp_output; cp_allocation; linked row protocol	q_i
film_conversion	Base film and coated web	mass = measured area × measured areal mass of the same film state; width × length gives tape area. Include only measured coating and housing in final mass.	cp_materials; cp_output	kg
solvent_balance	MEK; toluene	Air release = fresh external input + opening stock - closing stock - external recovered export - solvent in exported waste - solvent retained in accepted product - destroyed solvent. Internal recovery cancels. A negative residual requires investigation; it is not a zero emission. With incomplete stocks or destruction data use measured releases instead.	cp_solvents; cp_waste; cp_materials	kg species	epa-ap42-magnetic-tape
capture_control	Controlled solvent sources	For a separately measured evaporated species load L, outlet-plus-fugitive release = L × (1 - capture_fraction × removal_fraction). Use actual uptime and uncaptured sources. Recovery is removal, not chemical destruction; residual captured solvent requires stock/waste accounting. Do not add this estimate to a plantwide mass-balance estimate.	cp_solvents	kg species	epa-ap42-magnetic-tape
carbon_balance	Fossil carbon dioxide	CO2 = fossil carbon actually oxidized to CO2 × molecular mass(CO2)/atomic mass(C). Account separately for fuel and destroyed solvent; subtract carbon remaining as CO, organics or solids; retain chosen atomic-weight convention.	cp_carbon	kg CO2

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
quality_completeness	Foreground package	Reconcile all actual recipe ingredients, packaging and emissions with the representative cards; retain atomic extensions and documented absence decisions.	cp_materials; cp_waste; cp_solvents
quality_representativeness	All measured amounts	Disclose time, site and technology coverage, sampling, uncertainty, detection limits, missing periods and supplier proxies. Do not substitute historical EPA factors for site measurements.	Linked protocols and source applicability assessment
quality_ranges	Quantitative priors	No external numeric priors are prescribed. Any later inferred range requires at least two independent original-text sources with compatible boundary, unit and product state, plus geographic/technological synthesis. Retain measured values and uncertainty meanwhile.	Foreground protocols and independence assessment

9. Validation Rules

rule_id	applies_to	rule	source_ids
validate_identity	reference_product	Require complete qualifiers, a single declared output state, positive accepted mass, and evidence of blank-media acceptance. A generic flow name alone does not define an interchangeable recording service.	un-cpc-3-0-structure-2025
validate_reconciliation	inventory	Each physical exchange needs one concrete identity, compatible unit, source records and matching process. Confirm total accepted output plus rejects and stock changes against inputs; investigate balance residuals using measurement uncertainty rather than a fabricated tolerance.
validate_solvents	solvent_control	Check species completeness, capture versus removal, internal recovery cancellation, residual-in-waste and destruction accounting. Do not publish both full solvent volatilization and full oxidation of that same solvent.	epa-ap42-magnetic-tape
validate_boundaries	upstream_links	Reject circular coated-web links, duplicated utility or transport burdens, and missing external waste treatment. Require explicit treatment of conditional operations and actual exchanges absent from the representative cards.
validate_comparisons	downstream_use	Allow manufacturing comparison only after matching format, output state, capacity/quality, boundary and allocation. Storage-service comparison requires a separate functional scenario and cannot follow from kg-normalized results alone.	quantegy-magnetic-tape-components

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset; background_dataset
downstream_use	Supplier media-manufacturing input to a separately specified recording/storage model.
allowed_use	Matching format/state manufacturing process, with supplier and waste-treatment links and disclosed uncertainty.
excluded_use	Unqualified interchange of tape, floppy disk, optical disk, SSD or hard-disk drive; data-centre operational savings; universal archive lifetime.
required_metadata	All reference qualifiers; reporting period; operator; geography; net output; process route; packaging; suppliers; allocation; transport and treatment boundaries.
required_quality_disclosure	Primary data share, missing exchanges, proxy identities, measurement uncertainty, solvent/carbon closure, conditional exclusions and range-evidence limitations.
update_trigger	Format, formulation, substrate, supplier, manufacturing route, control system, utility mix or acceptance specification changes.

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	CPC 3.0 structure, 30 June 2025; retrieved 2026-09-09; independence_key: un-cpc-3-0-structure-2025	CPC 3.0 product title and neighbouring category distinctions; row 47530.
un-cpc-2-1-magnetic-media-note	official_guidance	CPC Version 2.1, subclass 47530 explanatory note; retrieved 2026-09-09; independence_key: un-cpc-2-1-47530	Historical detailed scope: tapes, cartridges, cassettes, floppy disks; excludes hard disks, recorded media and stripe cards. Used as semantic context alongside the current 3.0 title, not represented as 3.0 explanatory notes.
epa-ap42-magnetic-tape	official_guidance	AP-42 Section 4.2.2.13 Magnetic Tape Manufacturing, September 1990, reformatted January 1995; retrieved 2026-09-09; independence_key: epa-ap42-4-2-2-13-1990	Sections 4.2.2.13.1-3 and process diagram: coating and finishing, solvent capture versus destruction, solvent balance. Historical US guidance supports mechanisms only; no default consumption or control efficiencies adopted.
epa-magnetic-tape-risk-review	official_guidance	Hazardous Air Pollutant Emissions From Magnetic Tape Manufacturing Operations: Background Information for Technology and Residual Risk Review; retrieved 2026-09-09; independence_key: epa-9100923x	Chapter 2, sections 2.1.1 and 2.1.3: mix preparation, cleaning, casings, solvent recovery, waste and wastewater origins. No legal limits or historical emission proportions adopted.
quantegy-magnetic-tape-components	literature	A View of Preservation from a Magnetic Tape Manufacturer's Perspective, Quantegy, hosted by Library of Congress; retrieved 2026-09-09; independence_key: quantegy-view-preservation	Pages 1-2: PET base film, backcoat, binder, lubricant and magnetic layer distinctions; format-specific physical design. No service-life values adopted.
loc-magnetic-tape-binder-research	official_guidance	Magnetic Tape Sticky Shed Research: Characterization, Diagnosis, and Treatment; retrieved 2026-09-09; independence_key: loc-sticky-shed-research	Background and project description verified in downloaded official HTML: polyester-urethane binder in historical audio/video tapes; supports conditional binder identity, not a universal modern recipe or lifetime.
fujifilm-recording-media	literature	Recording Media, Fujifilm Global; retrieved 2026-09-09; independence_key: fujifilm-global-recording-media	Magnetic recording tape for computers section: commercial barium-ferrite tape route. No performance or lifetime claim imported.