Distribution Protocol
Mass balance distribution methodologies determine how physical sustainability attributes are assigned across co-products in chemical recycling and pulp processing. Under standard certification schemes, non-linear allocation permits a facility to concentrate certified credits onto specific high-value output batches rather than distributing credits uniformly across all output streams. This attribution model allows packaging manufacturers to market select paperboard runs with high certified recycled content claims while designated secondary streams carry zero claims.
Verification rules ensure the total credit volume allocated across all outputs equals total certified input mass minus process losses.
Calculation Rule
Mathematical rules governing attribute assignment allow flexibilities in product labeling while maintaining overall mass balance integrity. When mixed recycled and virgin feedstocks enter a mill, non-linear allocation enables operators to aggregate incoming sustainability attributes into designated output product categories. A facility processing a mixed feed containing twenty percent certified bio-based pulp can assign a one hundred percent bio-based claim to twenty percent of its total paperboard production, leaving the remaining eighty percent as conventional product.
Processors maintain dedicated tracking algorithms to verify that aggregated claims match real physical input totals during each reporting period. Independent certification auditors examine attribution ratios and conversion factors to confirm that concentrated credit claims remain strictly bounded by validated input accounting.
Proportionality Limit
Certification schemes prohibit attribute transfer between non-equivalent product categories or unrelated physical sites. Allocation factors cannot exceed physical production volumes for any given output grade. Regulations governing consumer packaging claims increasingly restrict non-linear credit concentration on food-contact paper substrates.
