Crispbread; rusks, toasted bread and similar toasted products

1. Scope and Applicability

This rule covers crispbread, rusks, toasted bread and similar bakery products sold in a declared dry, crisp state. Record dough making, first baking, secondary toasting or drying, cooling, and actual packaging. Ordinary soft bread, biscuits, and products without the declared crisp market state are excluded.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.food-products-beverages-and-tobacco-textiles-apparel-and-leather-products.grain-mill-products-starches-and-starch-products-other-food-products.crispbread-rusks-toasted-bread-and-similar-toasted-products
classification_refs	CPC 3.0: 23410
covered_products	Crispbread; rusks, toasted bread and similar toasted products
excluded_products	ordinary soft bread; biscuits; ordinary bread without final toasting
representative_product	finished rye crispbread
production_route	declared direct bake-and-dry crispbread route, or first-bake, slice, and second-toast rusk/toasted-bread route
market_state	declare moisture, crisp texture, packaging state and at-gate mass

3. Reference Flow

Field	Value
What	provide edible dry crisp bakery product
How much	1 kg accepted finished product net mass
How well	declare product type, moisture and crisp quality specification
How long or cycle	one at-gate delivery; no assumed storage life
reference_flow_link	crispbread

Field	Value
Reference amount	1
Reference product flow	Finished rye crispbread
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	product type; source grain; first-bake and second-toast/drying route; moisture; packaging state; factory gate

Rusk and toasted-bread datasets use rusk or toasted_bread as their finished-product row, each normalized to 1 kg actual accepted net product. Do not use the rye-crispbread display or unresolved UUID as their product identity.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass	kg	Use a calibrated scale or traceable batch weighing record for accepted finished net mass in the declared market state, excluding packaging.
electricity_conversion	electricity	Net calorific value	MJ	Convert metered kWh to MJ by multiplying by 3.6; retain original meter records.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Declare whether grain flour or purchased already-baked bread enters the foreground and its source state.
starting_condition_role	upstream boundary for ingredient or already-baked intermediate
product_classification_scope	CPC 3.0 23410 finished product; ordinary bread input retains its original product identity
recursive_input_rule	Meter and disclose same-category rework separately; do not count one physical quantity as both new input and final output.
upstream_dataset_requirement	Link purchased flour, bread, fuel, electricity and packaging inputs to their respective upstream datasets.
disclosure	Disclose moisture, route, purchased-bread share, losses and packaging state.

rule_id	Applies to	Rule	source_ids
boundary_first_bake	all inventory rows	Include attributable in-house first baking and secondary toasting/drying; represent externally baked bread as a purchased input without repeating its off-site first bake.	toxins-2015-rusk
boundary_finished_state	finished product	Only accepted product in its declared dry crisp market state enters the 1 kg reference amount; exclude packaging mass from food net mass.	un-cpc-3-2025

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
base_make	Dough making and first bake	conditional	in-house crispbread or in-house first-baked bread for rusks	foreground ingredients and first bake	per 1 kg reference flow
toast_dry	Secondary toasting or drying and cooling	required	all covered products; declare actual heat-treatment route	finish product and losses	per 1 kg reference flow
packing	Primary packing	conditional	only when declared packaged market state uses polyethylene film	packaging input	per 1 kg reference flow

Process: Dough making and first bake (base_make)

Inputs

Product flows

Flour (flour)

Inclusion condition: When dough is made in-house.

• Selected flow: Flour 67b80ae5-687f-418a-84ba-f06b01a6139b
• Flow property / unit: Mass / kg
• Amount rule: Record flour mass by grain and milling specification.
• 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_base
• Sources: mustafa-2008-crispbread

Tap water (water)

Inclusion condition: When dough is made in-house.

• Selected flow: Tap water d1e0e36c-07f0-4a75-bdcb-efb5d9e2ac36
• Flow property / unit: Mass / kg
• Amount rule: Record water charged to dough; convert metered volume using documented density.
• 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_base
• Sources: mustafa-2008-crispbread

Fresh baker yeast (yeast)

Inclusion condition: Only when the recipe uses fresh yeast.

• Selected flow: Fresh baker yeast
• Flow property / unit: Mass / kg
• Amount rule: Record fresh baker yeast added to leavened dough.
• 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_base
• Sources: mustafa-2008-crispbread

Process: Secondary toasting or drying and cooling (toast_dry)

Inputs

Product flows

Plain baked bread for rusks (purchased_bread)

Inclusion condition: Only for rusks made from externally supplied bread; omit in-house intermediate transfers.

• Selected flow: Plain baked bread for rusks
• Flow property / unit: Mass / kg
• Amount rule: Record purchased baked bread entering slicing and second toasting.
• 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_heat
• Sources: toxins-2015-rusk

Electricity (electricity)

Inclusion condition: When electrical ovens, fans, conveyors, or controls operate.

• Selected flow: Electricity b989a649-ca09-44b8-abab-a069148d0b1e
• Flow property / unit: Net calorific value / MJ
• Amount rule: Record attributable electricity; convert kWh to MJ using 3.6 MJ/kWh.
• 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_heat

Pipeline-quality natural gas (natural_gas)

Inclusion condition: Only for natural-gas-fired equipment.

• Selected flow: Pipeline-quality natural gas 7766e51e-0b64-4fbb-89cb-489c33293137
• Flow property / unit: Volume / m3
• Amount rule: Record metered natural gas volume for baking and toasting/drying.
• 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_heat

Outputs

Product flows

Finished rye crispbread (crispbread)

Inclusion condition: Only for the crispbread route.

• Selected flow: Finished rye crispbread
• 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_output
• Sources: un-cpc-3-2025

Finished rusk (rusk)

Inclusion condition: Only for the rusk route.

• Selected flow: Finished rusk
• Flow property / unit: Mass / kg
• Amount rule: Record 1 kg accepted rusk after second toasting.
• 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_output
• Sources: toxins-2015-rusk

Finished toasted bread (toasted_bread)

Inclusion condition: Only for the toasted-bread route.

• Selected flow: Finished toasted bread
• Flow property / unit: Mass / kg
• Amount rule: Record 1 kg accepted toasted bread after final toasting.
• 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_output
• Sources: un-cpc-3-2025

Waste flows

Rejected baked bread (bread_reject)

Inclusion condition: When rejects leave the product system.

• Selected flow: Rejected baked bread
• Flow property / unit: Mass / kg
• Amount rule: Weigh rejected bread separately from accepted product and document destination.
• 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_output

Process: Primary packing (packing)

Inputs

Product flows

Polyethylene film (pe_film)

Inclusion condition: Only when the declared market state uses polyethylene film.

• Selected flow: Polyethylene film e64eb06c-6dc9-45f1-b003-3dc6c44b27e2
• Flow property / unit: Mass / kg
• Amount rule: Record primary polyethylene film used per accepted product mass.
• 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_pack

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_rework	all inventory rows	Prefer batch and product direct measurement. If a saleable co-product exists, record mass and destination and disclose any allocation separately; rejected waste is not accepted product.
allocation_shared_energy	electricity; natural_gas	Attribute shared oven and dryer utilities using submetering or verifiable operating time first; disclose unresolved shared quantities.

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_base	base_make	flour; water; yeast	batch weigh and recipe records	batch id; ingredient mass; grain type; product output mass	calibrated scales and ingredient issue records	kg	each batch	representative continuous production period	production site	per 1 kg reference flow	calibration, batch and purchase evidence
cp_heat	toast_dry	purchased_bread; electricity; natural_gas	purchase and meter records	bread mass; kWh; gas m3; product output mass	purchase weights and dedicated meters or documented allocation	kg; MJ; m3	each batch or continuous	representative continuous production period	production site	per 1 kg reference flow	calibration, batch and purchase evidence
cp_output	toast_dry	crispbread; rusk; toasted_bread; bread_reject	accepted and reject weigh records	product type; accepted net mass; reject mass; moisture; destination	calibrated net weighing after cooling and final drying	kg	each batch	representative continuous production period	production site	per 1 kg reference flow	calibration, batch and purchase evidence
cp_pack	packing	pe_film	material issue records	film grade; film mass; accepted output mass	weigh film issued and reconcile returns and scrap	kg	each batch	representative continuous production period	production site	per 1 kg reference flow	calibration, batch and purchase evidence

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_batch	all inventory rows	q_ref = q_batch / m_accepted; q_batch is the measured exchange in the covered batch; m_accepted is accepted finished net food mass in kg.	q_batch; m_accepted; cp_output	q_ref
electricity_mj	electricity	MJ = kWh × 3.6	kWh; cp_heat	MJ

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_route	all inventory rows	Declare product type, ingredients, purchased bread status and first-bake/second-toast state.	batch recipe and purchase record
dq_mass	finished product	Weigh accepted product, rejects and packaging separately; moisture must match the at-gate state.	calibration, quality and packaging records

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference	finished product	Accepted finished food net mass is the denominator of the 1 kg reference; exclude packaging and rejected bread.
validate_route	all inventory rows	Check declared secondary toasting/drying, purchased bread and in-house first-bake conditions; do not double-count intermediate bread.	toxins-2015-rusk
validate_missing	all inventory rows	Keep unresolved product and waste UUIDs explicit; do not substitute nearby database flows.

10. Published Dataset Profile

Field	Value
dataset_role	accepted finished product foreground data package
downstream_use	secondary_dataset; background_dataset
allowed_use	model crispbread, rusk or toasted bread only for the declared route and market state
excluded_use	ordinary soft bread, biscuits or other untoasted products
required_metadata	product type; grain; route; moisture; packaging; site; period; factory gate
required_quality_disclosure	metering, allocation, rejects and unresolved UUIDs
update_trigger	change in ingredients, route, toasting process, packaging or moisture

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-2025	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 classification identity
mustafa-2008-crispbread	literature	Arwa Mustafa, Acrylamide in Bread: Precursors, Formation and Reduction, 2008 thesis, §2.2. https://pub.epsilon.slu.se/1789/1/Arwa_Mustafa_thesis_08.pdf	crispbread bake-and-dry stages; laboratory case only
toxins-2015-rusk	literature	Deoxynivalenol & Deoxynivalenol-3-Glucoside Mitigation through Bakery Production Strategies: Effective Experimental Design within Industrial Rusk-Making Technology, Toxins 7 (2015), 2773–2790. https://mdpi-res.com/d_attachment/toxins/toxins-07-02773/article_deploy/toxins-07-02773.pdf	rusk first bake, slicing and second toast sequence