Optical media, not recorded

1. Scope and Applicability

This PCR governs foreground data for finished optical recording media supplied without recorded user content. It covers blank write-once and rewritable discs, including CD, DVD and Blu-ray formats, and blank optical-disc cartridges when their housing is declared. Factory tracking, addressing and format information do not by themselves make a blank disc recorded content (un-cpc-3-0-structure-2025, ecma-359-2004).

The representative manufacturing route is a dye-based DVD-R: resin conditioning and substrate moulding, recording-layer coating and drying, metallization, edge cleaning, bonding, testing and packing. The process map provides collection blocks for one aggregate foreground factory system; these blocks are not independently balanced unit-process datasets. Interstage disc transfers are production records, not additional external product inputs. Sources nist-sp-500-252-2003 and bayer-wo2011092200a1 support the layer and process distinctions.

Recorded content, replicated ROM discs, erased second-hand media, disc drives, magnetic media, solid-state storage devices, and separately supplied masters or stampers are excluded. Manufacturing a stamper used in production is an upstream input requirement, not an in-scope reference product. The Chinese title is an authored translation checked against china-mof-optical-media-2013; its terminology does not create an HS mapping.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.radio-television-and-communication-equipment-and-apparatus.optical-media-not-recorded
classification_refs	CPC 3.0 47540; semantic context only
covered_products	New finished blank optical media with declared write-once or rewritable recording mechanism
excluded_products	Recorded and replicated content media; previously used erased discs; drives; magnetic and solid-state media; separately sold masters and stampers
representative_product	Blank 120 mm single-sided DVD-R with declared nominal 4.70 Gbyte capacity; dye and reflector composition specified by supplier
production_route	Condition resin; mould substrate; apply recording layer; dry; metallize; clean edges; bond if required; inspect and test; pack
market_state	Accepted finished unrecorded medium at factory gate, including required functional layers; detachable packaging inventoried separately

3. Reference Flow

Field	Value
What	Supply blank optical media capable of recording information in the declared format
How much	1 kg net accepted media; disclose equivalent disc count and aggregate nominal writable capacity
How well	Meet declared format and manufacturer acceptance criteria; ECMA-359 applies only to a conforming DVD-R model, not to every optical format
How long or cycle	One manufacturing delivery; no assumed archival lifetime, number of rewrites or user recording cycles
reference_flow_link	reference_product

Field	Value
Reference amount	1
Reference product flow	Optical media, not recorded 714535e8-24d4-44bf-8496-4837f638fdd4
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 model; diameter; writable nominal capacity and capacity convention; layer and side count; write-once or rewritable; recording-layer chemistry; reflector composition; substrate material; protective and bonding layers; new unrecorded state; mean net medium mass and count; integral cartridge housing if any; detachable packaging; acceptance specification and test sampling; plant, geography, technology, reporting period and declared starting condition

Declare every required qualifier in the foreground package. Mass normalization supports production inventories, not equal-service comparisons between formats. A comparative storage-service study must additionally specify usable capacity, recording success, rewriting, retention duration and drive compatibility; neither nominal capacity nor a longevity statement establishes that service. Format and material evidence: ecma-359-2004, cci-notes-19-1.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
net_media_mass	reference_product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh accepted media without detachable packaging. Include integral cartridge parts only when declared part of the reference object.
count_mass	acceptance and packaging	Mass	kg	Calculate accepted mass from lot count times measured mean net medium mass; retain sampling, tare and calibration records. Never assign a universal disc mass.
energy_conversion	electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve the electricity carrier; 1 kWh = 3.6 MJ is a unit identity. Do not interpret the database property label as a fuel or convert a shared meter into multiple carriers.
formulated_input	dye, adhesive and lacquer	Mass	kg	Record supplied formulation mass and constituent fractions. Purchased premix and its constituents must not both be external inputs; an on-site mixing route must instead record its actual individual purchased ingredients.
gas_water_conversion	argon and water	Mass	kg	Preserve metered volume records and convert with documented composition, density, temperature and pressure; circulating throughput is not make-up consumption.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Receipt of specified substrate resin, supplied coating formulations, reflector feedstock and packaging at the manufacturing site
starting_condition_role	Foreground entry state for a factory-gate partial life-cycle inventory
product_classification_scope	Finished new unrecorded optical medium; upstream resin and chemical production are distinct product categories
recursive_input_rule	If purchased blank media enter the same category, record their actual state and quantity with an upstream supplier dataset and model only subsequent operations; do not recreate their prior production or substitute them for virgin resin
upstream_dataset_requirement	Attach compatible supplier or background datasets for actual material form, chemistry, energy supply, transport and treatment. A flow UUID establishes identity, not an upstream inventory.
disclosure	Disclose supplier geography, subcontracted steps, transport legs, treatment destinations, excluded stages, internal recovery, integral housings and the aggregation boundary

rule_id	applies_to	rule	source_ids
boundary_factory	foreground system	Include attributable production, rejected and test-consumed discs, packing and site services. Link upstream manufacture, inbound transport and external waste treatment when constructing the cradle-to-gate result.	wri-wbcsd-product-standard-2011
boundary_partial	downstream use	Exclude customer recording, reading, distribution after the factory gate and post-consumer treatment from this partial result; disclose the limitation and add separate scenarios for a whole-life assessment.	wri-wbcsd-product-standard-2011
boundary_route	format instantiation	For rewritable media, document the actual phase-change alloy, each dielectric formulation and initialization step; for Blu-ray, document its actual recording and cover-layer technology. Add one concrete exchange per actual material or release, with no reuse of dye quantities across these routes.	nist-sp-500-252-2003, cci-notes-19-1
boundary_completeness	site collection	Reconcile the full recipe, utilities ledger and waste register against the cards. Add actual coating additives, edge cleaners, gases, fuels, refrigerant losses, tooling amortization, cartridge parts and packaging components as separate exchanges where present. Missing data are not zero and small mass alone does not justify excluding thin functional layers.
boundary_transfers	outsourced and internal stages	Retain interstage counts in cp_output. Include subcontracted operations once; purchased semifinished substrates require their own upstream identity and replace only the operations already performed. Internal regrind and solvent recovery remain internal transfers with their processing burdens.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
disc_manufacture	Substrate and functional-layer manufacture	required	Every production route; instantiate its actual layer chemistry	foreground production	1 kg net accepted finished media
disc_bonding	Bonding and UV curing	conditional	Disc construction bonds substrates with UV-curable adhesive	foreground finishing	Same accepted-media denominator
disc_lacquering	CD protective lacquer application	conditional	The CD construction uses a separate protective lacquer	foreground finishing	Same accepted-media denominator
site_services	Metered site services	required	Include actual attributable services, with water rows conditional	foreground support	Same accepted-media denominator
pack_release	Packing, acceptance and factory release	required	Every accepted output; actual packaging components only	foreground output	1 kg net accepted media

All cards are boundary exchanges of the aggregate system. Conditional cards require a recorded applicability decision. An absent exchange may be marked not applicable only with evidence; a missing quantity remains a data gap. Process and route descriptions define applicability, not default numerical recipes.

Process: Substrate and functional-layer manufacture (disc_manufacture)

Inputs

Product flows

Substrate resin (polycarbonate)

Record this external exchange through the specified collection protocol.

• Selected flow: Polycarbonate granulate 0c945ca0-edf2-41f3-ba9e-23af3e75c6d1
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Net external resin consumed, excluding internally recirculated sprues; weigh both DVD halves.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_materials
• Sources: nist-sp-500-252-2003

Reflective-layer silver (silver)

Inclusion condition (inclusion_condition): Monometal silver reflector is used; a silver alloy needs its own composition-specific exchange.

• Selected flow: silver 7db0c01b-7605-4e92-90a1-c4bc6dd8e157
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed silver target consumption and reconciled target inventory; distinguish deposited silver, recoverable target remnants and coating-chamber losses.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_materials
• Sources: nist-sp-500-252-2003, bayer-wo2011092200a1

Recording-layer formulation (azo_dye_solution)

Inclusion condition (inclusion_condition): Verified product recipe uses an azo dye solution. Other dye families require separate recipe-specific exchanges.

• Selected flow: Optical-disc azo dye coating solution
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh one supplied coating formulation; retain formulation identifier, dye identity, solids fraction and every solvent mass fraction. Do not also count its constituents as purchased inputs.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_materials
• Sources: nist-sp-500-252-2003

Sputtering gas (argon_gas)

Inclusion condition (inclusion_condition): Purchased gaseous argon feeds sputtering.

• Selected flow: Gaseous argon
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Meter delivered gas and convert to mass using supplier density at declared pressure and temperature; exclude internal gas circulation.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_materials
• Sources:

Equipment-cleaning solvent (isopropanol)

Inclusion condition (inclusion_condition): Equipment cleaning uses isopropanol; this is not a default dye carrier or universal edge-cleaning recipe.

• Selected flow: Isopropanol a4a75541-e156-4e30-947c-ba067a682afd
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed external isopropanol use corrected for stock changes; identify purity and exclude internal recovered-solvent circulation.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_materials
• Sources:

Outputs

Waste flows

External moulding scrap (pc_moulding_scrap)

Inclusion condition (inclusion_condition): Uncoated polycarbonate is discarded across the site boundary.

• Selected flow: Clean polycarbonate moulding scrap
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh clean uncoated polymer scrap leaving the site for treatment; disclose destination and distinguish internal regrind.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste
• Sources:

Coated rejects including destructive tests (metallized_disc_reject)

Inclusion condition (inclusion_condition): Coated or bonded discs fail quality tests or are sacrificed for testing.

• Selected flow: Rejected metallized optical disc
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh rejected coated discs by composition and treatment destination; include recording tests that consume saleable output.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste
• Sources:

Spent coating formulation (spent_dye_solution)

Inclusion condition (inclusion_condition): Azo coating solution is discarded rather than internally recovered.

• Selected flow: Spent optical-disc azo dye coating solution
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh externally discarded liquid of the same declared coating formulation; retain solvent composition, solids and treatment destination.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste
• Sources:

External spent cleaning solvent (spent_isopropanol)

Inclusion condition (inclusion_condition): Isopropanol cleaning generates a separately collected spent solvent.

• Selected flow: Spent isopropanol cleaning solvent
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh the isopropanol cleaning waste solution and measure its solvent fraction; document contamination and recovery or treatment destination.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste
• Sources:

Elementary flows

Direct cleaning-solvent release (isopropanol_air)

Inclusion condition (inclusion_condition): Isopropanol crosses to outdoor air; specify release location.

• Selected flow: isopropanol fe0acd60-3ddc-11dd-a843-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Measured release or species-resolved solvent balance after recovery and abatement; subtract solvent retained in waste and product.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_releases
• Sources:

Direct dye-carrier release (tetrafluoropropanol_air)

Inclusion condition (inclusion_condition): Supplier formulation confirms this solvent and a direct release occurs.

TianGong supplies no Chinese baseName for this flow; the aligned Chinese Selected flow retains its canonical English name.

• Selected flow: 2,2,3,3-Tetrafluoro-1-propanol 8a309c78-e251-11e6-bf01-fe55135034f3
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Calculate only this species from the documented coating formulation and measured recovery, retention and abatement; do not equate all VOC to this compound.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_releases
• Sources:

Process: Bonding and UV curing (disc_bonding)

Inputs

Product flows

DVD bonding formulation (uv_bonding_adhesive)

Inclusion condition (inclusion_condition): The declared disc construction uses UV-curable acrylate bonding.

• Selected flow: UV-curable acrylate DVD bonding adhesive
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh the complete supplied adhesive formulation issued to bonding, corrected for recoverable returns and inventory; record cured mass retained in discs.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bonding
• Sources: bayer-wo2011092200a1

Process: CD protective lacquer application (disc_lacquering)

Inputs

Product flows

CD protective coating (uv_cd_lacquer)

Inclusion condition (inclusion_condition): A CD route has a UV-curable acrylate protective lacquer; absent for the representative bonded DVD-R.

• Selected flow: UV-curable acrylate CD protective lacquer
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weigh one supplied lacquer formulation net of returned liquid; record composition and cured retention.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_lacquer
• Sources: nist-sp-500-252-2003

Process: Metered site services (site_services)

Inputs

Product flows

Purchased electricity (electricity)

Record this external exchange through the specified collection protocol.

• 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: Meter all attributable drying, moulding, coating, vacuum, curing, testing, packing, compressed-air generation and cooling electricity, including allocated standby. Convert kWh to MJ.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy
• Sources:

Supplied make-up water (process_water)

Inclusion condition (inclusion_condition): The site takes supplied process water for its attributable operations.

• 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: Meter supplied make-up water mass; record supply quality, source and density conversion. Do not count recirculating cooling-loop throughput.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_water
• Sources:

Outputs

Waste flows

External cooling blowdown (cooling_blowdown)

Inclusion condition (inclusion_condition): Evaporative cooling produces blowdown sent to external treatment.

• Selected flow: Cooling-tower blowdown wastewater
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Meter blowdown mass and composition to external treatment; retain water chemistry and destination, without treating this as an elementary emission.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_water
• Sources:

Elementary flows

Evaporative water loss (evaporated_water)

Inclusion condition (inclusion_condition): Evaporative water loss occurs.

• Selected flow: Water vapour emitted to air
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Measure or calculate evaporation from make-up minus blowdown, retained water, drift and inventory change; report drift separately if present.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_water
• Sources:

Process: Packing, acceptance and factory release (pack_release)

Inputs

Product flows

Shipping box (corrugated_box)

Inclusion condition (inclusion_condition): Corrugated board boxes accompany the shipped discs.

• 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: Count boxes used and multiply by measured tare mass per box; include packing rejects and identify recycled fibre content.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging
• Sources:

Disc-stack spindle (pp_spindle)

Inclusion condition (inclusion_condition): A polypropylene spindle is supplied with the discs.

• Selected flow: Polypropylene optical-disc packaging spindle
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Count polypropylene spindle components and multiply by measured component mass; a cover of another polymer requires a separate exchange.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging
• Sources:

Outputs

Product flows

Accepted blank media (reference_product)

Record this external exchange through the specified collection protocol.

• Selected flow: Optical media, not recorded 714535e8-24d4-44bf-8496-4837f638fdd4
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Normalize accepted net media output to 1 kg, excluding detachable packaging and rejected or test-recorded discs; retain accepted count and measured mean disc mass.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted media at factory gate; common denominator Q
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_output
• Sources: un-cpc-3-0-structure-2025, ecma-359-2004

7. Allocation and Co-product Handling

rule_id	applies_to	rule	source_ids
allocation_subdivide	shared production	Prefer submetering and campaign subdivision. For unavoidable shared loads use a measured causal driver, such as machine time under matched loading; count allocation is justified only for equivalent products and routes.	wri-wbcsd-product-standard-2011
allocation_losses	rejects and recycling	Keep yield losses with accepted output. Record external scrap transfers, their status and recycling convention; do not credit avoided virgin resin or silver without an explicitly justified model.	wri-wbcsd-product-standard-2011
allocation_reconcile	allocation factors	Retain driver totals and assigned shares; allocated campaign quantities must reconcile to the original meter or ledger. Internal recovery is not a saleable co-product and creates no avoided-production credit.

8. Foreground Data Collection, Calculation, and Quality Rules

The following are PCR-designed collection protocols. Collect a representative continuous reporting period that captures normal production, startups, changeovers, rejects and idle operation; declare dates and explain representativeness. Every raw record carries site, line, campaign, model, unit, date, source-record identifier and responsible reviewer. Do not substitute a patent example for a plant record.

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	disc_manufacture	individual material inputs	stock and dosing records	material and formulation id; composition; receipts; opening and closing stock; external returns; internal recovery; issued mass; density; gas conditions	weigh issues and returns; reconcile with purchases; retain supplier specification	kg; original gas volume	each lot and stock reconciliation	full declared campaign series	each manufacturing line and outsourced step	external consumption by material divided by accepted mass Q	calibrated scales; BOM; formulation sheet; reconciled ledger
cp_bonding	disc_bonding	individual material inputs	stock and dosing records	material and formulation id; composition; receipts; opening and closing stock; external returns; internal recovery; issued mass; density; gas conditions	weigh issues and returns; reconcile with purchases; retain supplier specification	kg; original gas volume	each lot and stock reconciliation	full declared campaign series	each manufacturing line and outsourced step	external consumption by material divided by accepted mass Q	calibrated scales; BOM; formulation sheet; reconciled ledger
cp_lacquer	disc_lacquering	individual material inputs	stock and dosing records	material and formulation id; composition; receipts; opening and closing stock; external returns; internal recovery; issued mass; density; gas conditions	weigh issues and returns; reconcile with purchases; retain supplier specification	kg; original gas volume	each lot and stock reconciliation	full declared campaign series	each manufacturing line and outsourced step	external consumption by material divided by accepted mass Q	calibrated scales; BOM; formulation sheet; reconciled ledger
cp_energy	site_services	electricity	meter records	opening and closing meter; kWh; line runtime; standby; shared load; allocation driver	interval submetering and utility-bill reconciliation	kWh and MJ	each meter interval and campaign	same period as Q	site and production/support submeters	attributable meter differences times 3.6 divided by Q	calibration; bill check; allocation calculation
cp_water	site_services	make-up, blowdown and evaporation separately	meters and water balance	incoming mass or volume; density; blowdown; evaporation; drift; retained water; stock changes; composition; treatment destination	meter each boundary stream; close water balance	kg; original m3	each campaign and discharge event	same period as Q	attributable cooling and process-water systems	each stream divided by Q; internal recirculation excluded	meter calibration; analysis; destination records; balance residual
cp_waste	disc_manufacture	individual waste streams	transfer and test records	stream id; wet mass; polymer or solvent fraction; metal content; rejected count; internal recovery; destination	separate weighing and waste-composition records	kg and count	each transfer and reject lot	same period as Q	each generating line and external recipient	total external stream mass divided by Q	weighing tickets; treatment contract; test log
cp_releases	disc_manufacture	each named atmospheric species	emission measurement or solvent balance	species; formulation mass fraction; input; recovery; retained product and waste; abatement; release compartment	integrate concentration and exhaust volume or use species-resolved balance	kg per species	each campaign with operating-state coverage	same period as Q	coating and cleaning emission points	direct post-abatement species mass divided by Q	method report; recovery records; detection limits; uncertainty
cp_packaging	pack_release	box and spindle separately	packing counts and tare	component identity; polymer or fibre grade; issued count; component mass; returns; rejected packaging	count and representative component weighing	count and kg	each packaging configuration and lot	same period as Q	packing lines	each component count times mean mass divided by Q	packing BOM; sampled tare; reconciliation
cp_output	pack_release	reference product and yield	production and acceptance records	model; interstage counts; accepted count; net disc mass sample; rejects; destructive-test count; WIP changes; nominal capacity; specification	calibrated weighing, counters and documented optical acceptance testing	kg; count; declared capacity unit	each production lot	same period as inputs	every included production stage	Q is accepted count times measured mean net mass, reconciled with stock	signed release; test results; tare check; counter and scale calibration

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize	all external exchanges	q_i = X_i / Q, where X_i is the allocated campaign exchange and Q is accepted net medium mass; Q must be positive	cp_materials; cp_bonding; cp_lacquer; cp_energy; cp_water; cp_waste; cp_releases; cp_packaging; cp_output	exchange per 1 kg accepted media
accepted_mass	reference_product	Q = sum of accepted lot counts multiplied by their sampled mean net mass; exclude packaging and destructive-test discs	cp_output	accepted kg and equivalent count
material_consumption	purchased materials	External consumption = opening stock + receipts - closing stock - external unused returns; account for WIP changes and internal transfers explicitly	cp_materials; cp_bonding; cp_lacquer; cp_output	consumed material mass
solvent_balance	each solvent release	Release = solvent input - retained product - solvent in external waste - recovered solvent exported - solvent destroyed - inventory increase; internally recycled solvent cancels. Negative residuals trigger investigation.	cp_materials; cp_bonding; cp_lacquer; cp_releases; cp_waste	direct release of one solvent species
yield_balance	physical completeness	Reconcile incoming external material with accepted product, external rejects, recoverable output, emissions and stock changes; preserve separate polymer, reflector and solvent balances	cp_materials; cp_bonding; cp_lacquer; cp_output; cp_waste; cp_releases	documented residual and investigation

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	all materials and media	Preserve format, recording mechanism, composition, supply form and quality designation; supplier evidence must confirm the representative recipe applies	BOM, specification and signed acceptance
dq_coverage	all stages	Reconcile records with the process map; disclose unmeasured flows, missing suppliers, treatment coverage and estimates without turning blanks into zero	completeness register and ledger checks
dq_measurement	normalized amounts	Use common dates and product boundaries; disclose sampling, calibration, allocations, detection limits and uncertainty	raw records and calculation workbook
dq_range	quantitative QA	Assess results with plant balances and measurement uncertainty; this PCR supplies no empirical production interval or archival-lifetime default	balance review and documented evidence gaps

9. Validation Rules

rule_id	applies_to	rule	source_ids
validate_identity	reference object	Verify new unrecorded market state, all qualifiers and the link to reference_product; exclude recorded rejects from accepted output.	un-cpc-3-0-structure-2025, ecma-359-2004
validate_units	inventory	Confirm positive Q, net-mass normalization, explicit unit conversions, and one material or species per exchange. A UUID cannot substitute for a missing quantity.
validate_route	process coverage	Every required process has collection evidence; every conditional process and card has a declared applicability decision. Alternate recording chemistries require complete instantiated BOM and emissions coverage.
validate_balance	yields and releases	Check polymer, metal, solvent and water balances; investigate residuals using measured uncertainty and document the action. Do not force balance by creating an unnamed waste or emission.
validate_conformance	product quality	Retain applicable format tests, acceptance criteria and sampling basis. ECMA-359 conformance is a specification claim and does not supply an empirical inventory range.	ecma-359-2004
validate_boundary	downstream dataset	Disclose the partial boundary, missing upstream links, treatment destinations and unresolved exchanges; claims of complete life-cycle coverage require the omitted stages.	wri-wbcsd-product-standard-2011

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset or background_dataset after dataset-specific review
downstream_use	Supply of blank optical media to recording, distribution or storage-service models
allowed_use	Format- and route-matched factory-gate production; linking to separately declared downstream scenarios
excluded_use	Unqualified substitution for another recording technology, recorded-content production, drives, universal archive life or equal-service comparisons by mass alone
required_metadata	PCR identity and version; reference qualifiers; site and dates; net mass/count conversion; process boundary; supplier and treatment links; packaging; allocation; collection methods
required_quality_disclosure	Unresolved identities and amounts; missing stages; representativeness; measured versus calculated values; uncertainty; conformance evidence; review status
update_trigger	Change of recording chemistry, format, functional layers, supplier, energy mix, yield, recovery, packaging, site or supporting specification

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	UN Statistics Division, CPC Version 3.0 structure (30 June 2025); retrieved 2026-09-09; independence_key: un-cpc-3-0-structure-2025	CPC 47540 identity and adjacent unrecorded-media categories.
china-mof-optical-media-2013	official_guidance	China Ministry of Finance hosted bilingual tariff table, p. 165, row 6779; retrieved 2026-09-09; independence_key: mof-p020130708509079068339	Chinese terminology only; no tax rate or classification mapping is adopted.
nist-sp-500-252-2003	official_guidance	F. R. Byers, Care and Handling of CDs and DVDs, NIST SP 500-252 (2003), section 3; retrieved 2026-09-09; independence_key: nist-sp-500-252	Polycarbonate, recording-layer distinctions, reflective metals, CD lacquer and DVD construction.
ecma-359-2004	standard	ECMA-359, 1st edition (December 2004), clauses 1, 2, 7, 14 and 26; retrieved 2026-09-09; independence_key: ecma-359-ed1-2004	DVD-R format, blank-state preformatting and conformance scope; no production ranges.
cci-notes-19-1	official_guidance	Canadian Conservation Institute, Longevity of Recordable CDs, DVDs and Blu-rays, Notes 19/1; retrieved 2026-09-09; independence_key: cci-notes-19-1	Material-dependent recording routes, Blu-ray distinctions and limitations on lifetime claims.
bayer-wo2011092200a1	literature	Bayer MaterialScience, High Speed DVDs, WO 2011/092200 A1 (4 August 2011), description pp. 12-13; original English publication reproduced with HK1177810A; retrieved 2026-09-09; independence_key: wo2011092200a1	Technical route example: resin drying, moulding, dye spin coating and drying, sputtering, edge cleaning and UV bonding. Patent case quantities are not general benchmarks.
wri-wbcsd-product-standard-2011	standard	WRI/WBCSD, Product Life Cycle Accounting and Reporting Standard (2011), chapters 6-9; retrieved 2026-09-09; independence_key: ghg-protocol-product-standard-2011	Reference-flow disclosure, partial life-cycle boundaries, primary data and allocation hierarchy.