Chamois leather; patent leather and patent laminated leather; metallized leather

1. Scope and Applicability

This rule covers saleable animal-hide chamois, patent, patent laminated, and metallized leather at the factory gate. Declare each actual production route separately. Synthetic leather, plastic sheets, ordinary leather, and downstream leather articles are outside this boundary. Product identity follows CPC 3.0 and official leather classification guidance [un-cpc-2025; eu-jrc-tanning-2013].

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.food-products-beverages-and-tobacco-textiles-apparel-and-leather-products.leather-and-leather-products-footwear.chamois-leather-patent-leather-and-patent-laminated-leather-metallized-leather
classification_refs	CPC 3.0 29110, identity context only; no accepted mapping implied
covered_products	animal-hide chamois leather; patent and patent laminated leather; metallized leather
excluded_products	synthetic leather; ordinary leather; composition leather; finished footwear and bags
representative_product	accepted finished animal-hide chamois leather at factory gate
production_route	oil tannage; lacquer coating; preformed plastic film lamination; metallic foil transfer, each as declared
market_state	accepted saleable finished leather including actual coating mass

3. Reference Flow

Field	Value
What	specialty animal-hide leather for further fabrication
How much	1 kg
How well	declared chamois, patent, patent laminated, or metallized route and leather state
How long or cycle	one factory-gate acceptance; no use lifetime assigned
reference_flow_link	finished_leather

Field	Value
Reference amount	1
Reference product flow	Finished specialty animal-hide leather
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	animal origin; substrate tanning state; exact finished route; coating or film polymer; film thickness; metal type; accepted moisture state; factory-gate scope

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	finished_leather	Mass	kg	Verify accepted finished net mass using a calibrated scale or traceable weighing record, excluding transport packaging; report every exchange per 1 kg reference flow.
area_to_mass	leather or film recorded by area	Mass	kg	Convert area records to mass only with measured areal mass and moisture state for the same lot; retain original area and conversion evidence.

5. System Boundary

The foreground boundary starts with receipt of animal-hide substrate and ends with acceptance of finished leather at the factory gate. Hide acquisition, upstream tanning, energy supply, and waste treatment require traceable upstream datasets; expand the foreground if those operations occur at the reporting site [eu-jrc-tanning-2013].

Boundary Abstraction

Field	Value
declared_starting_condition	received identified animal-hide split or tanned animal-hide leather
starting_condition_role	foreground material input with upstream production in linked datasets
product_classification_scope	animal-hide specialty finished leather within CPC 29110
recursive_input_rule	if purchased same-category finished leather is reworked, disclose its input mass and existing finished share separately
upstream_dataset_requirement	compatible animal-hide, upstream tanning, oil, varnish, film, foil, electricity and waste-treatment datasets
disclosure	received state, route, factory gate, upstream gaps, and separate output quantities by product type

rule_id	Applies to	Rule	source_ids
boundary_route	all routes	Separate chamois, patent, laminated and metallized lots; include only atomic exchanges that actually occur.	un-cpc-2025, eu-jrc-tanning-2013
boundary_coating	surface routes	Record actual coating, film or foil applied to leather, retained in product, lost as scrap or emitted; verify the declared finishing route from production records.	eu-jrc-tanning-2013

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
substrate_receipt	Animal-hide substrate receipt	required	all routes	foreground input verification	per 1 kg reference flow
chamois_tannage	Oil tannage and washing	conditional	chamois route only	foreground oil tannage	per 1 kg reference flow
surface_finishing	Coating, lamination or metallic foil transfer	conditional	patent, laminated or metallized route only	foreground finishing	per 1 kg reference flow
grading_dispatch	Grading and factory-gate acceptance	required	all routes	foreground acceptance	per 1 kg reference flow

Process: Animal-hide substrate receipt (substrate_receipt)

Inputs

Product flows

Sheepskin split substrate (sheepskin_split)

Record only when the declared condition holds: Chamois route only; received split must be traceable to animal hide. Obtain quantity from same-lot primary records.

• Selected flow: Tanned sheepskin split
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_substrate
• Sources: eu-jrc-tanning-2013

Tanned leather substrate (tanned_base_leather)

Record only when the declared condition holds: Patent, laminated, or metallized route only; disclose animal origin and tanning state. Obtain quantity from same-lot primary records.

• Selected flow: Tanned animal-hide leather
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_substrate
• Sources: un-cpc-2025

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Process: Oil tannage and washing (chamois_tannage)

Inputs

Product flows

Oil tanning input (cod_oil)

Record only when the declared condition holds: Chamois route using cod oil; alternative oils require separately identified atomic rows. Obtain quantity from same-lot primary records.

• Selected flow: Cod oil
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_tannage
• Sources: eu-jrc-tanning-2013

Post-tanning washing alkali (sodium_carbonate)

Record only when the declared condition holds: Only where sodium carbonate is actually used in washing. Obtain quantity from same-lot primary records.

• Selected flow: Sodium carbonate 6827e314-666a-4786-ac60-00770c61678b
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_tannage
• Sources: eu-jrc-tanning-2013

Washing water supply (process_water)

Record only when the declared condition holds: Only where washing water crosses the facility boundary. Obtain quantity from same-lot primary records.

• Selected flow: Process water
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water
• Sources: eu-jrc-tanning-2013

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Oil-tannage wastewater (tannery_wastewater)

Record only when the declared condition holds: Record the effluent sent to on-site or external treatment; disclose oil and COD load if measured. Obtain quantity from same-lot primary records.

• Selected flow: Oil-tannage process wastewater
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_wastewater
• Sources: eu-jrc-tanning-2013

Elementary flows

Process: Coating, lamination or metallic foil transfer (surface_finishing)

Inputs

Product flows

Patent coating varnish (acrylic_varnish)

Record only when the declared condition holds: Only a declared acrylic-varnish patent-leather formulation; other coatings need own atomic rows. Obtain quantity from same-lot primary records.

• Selected flow: Acrylic varnish 56a0ef1c-80ef-4e0c-b690-c8aefb4c7e8e
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_finish
• Sources: eu-jrc-tanning-2013

Patent lamination film (preformed_plastic_film)

Record only when the declared condition holds: Only a PVC-film laminated route; record film chemistry and thickness. Obtain quantity from same-lot primary records.

• Selected flow: Preformed PVC film
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_finish
• Sources: eu-jrc-tanning-2013

Metallized foil transfer input (aluminium_foil)

Record only when the declared condition holds: Only an aluminium-foil transfer route; account for transfer losses separately. Obtain quantity from same-lot primary records.

• Selected flow: Aluminum foil d3e373a5-987f-4e3a-9f5b-8feaa9aa01e2
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_finish
• Sources: us-patent-foil-transfer-2022

Purchased electrical energy (alternating_current)

Record only when the declared condition holds: Where finishing equipment uses purchased alternating current; meter and disclose grid supply. Obtain quantity from same-lot primary records.

• Selected flow: Alternating current
• Flow property / unit: Net calorific value / MJ
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electricity
• Sources: eu-jrc-tanning-2013

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Solvent emission to air (butyl_acetate_air)

Record only when the declared condition holds: Only if the coating contains n-butyl-acetate and measured or balanced losses reach air; compartment is unspecified air. Obtain quantity from same-lot primary records.

• Selected flow: n-butyl-acetate 4d9a8790-3ddd-11dd-97df-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_emission
• Sources: eu-jrc-tanning-2013

Process: Grading and factory-gate acceptance (grading_dispatch)

Inputs

Product flows

Waste flows

Elementary flows

Outputs

Product flows

Saleable finished specialty leather (finished_leather)

Record only when the declared condition holds: Report one declared route and accepted dispatch state; do not aggregate unlike routes without separate quantities. Obtain quantity from same-lot primary records.

• Selected flow: Finished specialty animal-hide leather
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_product
• Sources: un-cpc-2025

Waste flows

Trimming scrap (leather_cuttings)

Record only when the declared condition holds: Record actual cutting scrap by route and treatment destination. Obtain quantity from same-lot primary records.

• Selected flow: Finished leather trimming scrap
• Flow property / unit: Mass / kg
• Amount rule: Measure same-lot exchange quantity and report per 1 kg reference flow.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_scrap
• Sources: eu-jrc-tanning-2013

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision	all routes	First subdivide by route, lot and process; do not pool oil-tannage, coating and lamination inputs.	eu-jrc-tanning-2013
allocation_mass	shared inputs without separate meters	Allocate shared inputs only using traceable accepted product mass or equipment-time records and disclose the causal basis; do not offset waste flows by treatment credits.	eu-jrc-tanning-2013

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_substrate	substrate_receipt	substrate mass	receiving and supplier records	lot; species; input state; net mass	weigh or reconcile supplier weighbridge ticket	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_tannage	chamois_tannage	oil and alkali mass	batch dosing logs	lot; material name; dose mass	reconcile dosing and purchase records	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_water	chamois_tannage	washing water	meter records	meter id; opening; closing; lot	read calibrated water meter	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_wastewater	chamois_tannage	tannery effluent	effluent tank and discharge records	lot; discharge mass; treatment route	weigh tank or use calibrated flowmeter with density conversion	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_finish	surface_finishing	coating film and foil mass	coating and transfer records	lot; material identity; gross use; return; scrap	reconcile issue and return weights	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_electricity	surface_finishing	alternating current	submeter records	meter id; kWh; lot; grid source	read electricity submeter and convert kWh to MJ by 3.6	MJ	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_emission	surface_finishing	n-butyl-acetate air release	solvent balance or emission test	lot; formulation; solvent input; retained; recovered; emitted	use measured stack result or documented solvent mass balance	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_product	grading_dispatch	accepted finished mass	acceptance and scale records	lot; route; accepted net mass; rejects	weigh accepted leather on calibrated scale excluding transport packing	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records
cp_scrap	grading_dispatch	leather trimming scrap	scrap weighing and transfer tickets	lot; scrap mass; destination	weigh separately by route and destination	kg	each lot	all accepted lots in reporting period	reporting site	per 1 kg reference flow	calibration and primary records

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_lot	all inventory rows	Divide attributable lot exchange by accepted finished net mass in kg; report per 1 kg reference flow.	lot exchange; accepted finished net mass; cp_product	quantity per 1 kg reference flow
electricity_conversion	alternating_current	Convert recorded kWh to MJ using 1 kWh = 3.6 MJ.	kWh; cp_electricity	MJ

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	all lots	Declare animal substrate, finished route and coating chemistry by lot.	supplier declaration; batch record
dq_balance	all lots	Reconcile input, accepted output, scrap and effluent mass without hiding route losses.	weighing and discharge records
dq_time	all measured exchanges	Use one stated reporting period and disclose missing meters, estimates and data age.	meter logs; invoices

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference	all lots	Verify finished output is 1 kg accepted leather per 1 kg reference flow and route is declared.	un-cpc-2025
validate_chemistry	coating or oil routes	Verify actual oil, varnish, film, foil, water and solvent rows against production records; absent routes must not carry quantities.	eu-jrc-tanning-2013
validate_releases	all lots	Reconcile wastewater, cutting scrap and solvent release with waste tickets and emission records.	eu-jrc-tanning-2013

10. Published Dataset Profile

Field	Value
dataset_role	unit_process
downstream_use	secondary_dataset; background_dataset
allowed_use	leather datasets with matching route, animal-hide substrate and factory-gate state
excluded_use	direct proxy for synthetic leather, plastic film or downstream articles
required_metadata	route; animal origin; substrate state; coating and film chemistry; metal; reporting period; site; accepted net mass
required_quality_disclosure	UUID gaps; upstream datasets; missing meters; allocation and route output amounts
update_trigger	material change in substrate, route, formulation, site or measurement method

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-2025	official_guidance	UN Statistics Division, CPC Version 3.0 Structure (30 June 2025), https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv	product identity and neighboring category boundary
eu-jrc-tanning-2013	official_guidance	European Commission JRC, Best Available Techniques (BAT) Reference Document for the Tanning of Hides and Skins (2013), https://eippcb.jrc.ec.europa.eu/sites/default/files/2019-11/TAN_Published_def.pdf	oil tannage, washing, finishing emissions and process decomposition
us-patent-foil-transfer-2022	literature	US20220194276A1, Encapsulated foil leather transfer, https://patents.google.com/patent/US20220194276A1/en	conditional aluminium foil transfer route only