Content Threshold
Chain of custody accounting quantifies the exact proportion of forest raw material originating from independently audited sustainable sources within a paper production batch. A certified fibre percentage indicates the proportion of wood pulp inside a packaging substrate that complies with recognised forestry management standards. The calculation utilizes credit accounting systems or percentage transfer systems across defined mill manufacturing periods.
The metric governs input accounting balance and does not verify physical recycled content or post consumer waste ratios unless explicitly declared under separate standard definitions.
Balance Calculation
Mill inventory management systems track certified input tonnage against finished reel output across monthly production cycles. When virgin pulp shipments arrive at the pulper, certified fibre percentage values are logged into enterprise tracking databases. Production balance calculations apply transfer rules to assign claims to finished paperboard rolls.
If certified fibre input drops below mandated minimum thresholds, finished goods must carry diluted claim statements or lose certification status entirely. Accurate ledger management prevents fraudulent claims on commercial packaging stock.
Chain Verification
Third party certification bodies inspect mill balance ledgers annually to verify claim accuracy against raw material purchase orders. A verified certified fibre percentage protects packaging buyers from false environmental claims.