Recycled Containerboard Compression Loss under Constant Atmospheric Humidity
Recycled containerboard loses up to 45% compression strength under constant 85% RH; specify ISO 2233 derated SCT metrics to prevent static stack collapse.
PEFC Certified Claims
Sourcing Claim
Forest certification systems provide assurance to buyers that wood-based products come from sustainably managed forests and controlled sources. Within this framework, using pefc certified claims on packaging allows manufacturers to verify the percentage of certified raw material in their products. This mechanism ensures that the paperboard used in printed boxes can be traced back to responsible forestry.
By using these claims, companies show their commitment to legal and sustainable sourcing of wood fibers.
Chain Verification
Tracking the certified material from the forest to the final product requires a chain of custody system. Papermills and converters use pefc certified claims to document the flow of certified, recycled, or controlled materials through each stage of production. The percentage method allows the mill to mix certified and non-certified fibers, provided the average content remains above the threshold for the claim.
Continuous auditing by independent third-party bodies prevents false reporting.
Labeling Rules
Graphic designers must place the correct PEFC logo and claim wording on the packaging according to strict brand guidelines. Using these pefc certified claims on the finished box requires that the converter has a valid chain of custody certificate. This trace prevents unauthorized use of the logo on products that do not meet the sourcing criteria.