Proportion Allocation
Chain of custody certification protocols allow paper products to carry environmental claims based on the proportion of certified wood fibre they contain. The percentage claim system calculates the exact ratio of certified material to uncertified controlled wood in a manufacturing batch. It enables paper mills to blend different pulp streams while providing an honest representation of sustainable sources on the final packaging.
This method supports the gradual integration of responsibly managed forest products into mainstream supply chains.
Batch Calculation
A paper converter averages the certified input volume over a specific production run or a set time period to determine the claim percentage. This process ensures that if seventy percent of the pulp used in a run is certified, the finished paper board is labelled as containing seventy percent certified material.
Label Regulation
Strict thresholds dictate which environmental labels a finished package can carry under this system. If the proportion of certified wood fibre falls below seventy percent, the product cannot bear the standard mix label, restricting the claims that a brand owner can make on their retail packaging. This strict boundary protects consumers from misleading green claims and maintains the credibility of forest management certifications.
It establishes a clear, auditable trail that links consumer cartons directly back to verified forest origins.