Paperboard Chain of Custody Verification Standards for Packaging Buyers
Validating paperboard claims requires cross-checking certificate scope codes on public databases and securing batch migration test reports.
PFAS Migration
Barrier Safety
Chemical transport phenomena govern the movement of fluorinated compounds from food contact paper into oily or watery substances. Packaging chemists analyze pfas migration to evaluate the safety of barrier coatings under different storage temperatures and contact times. These persistent compounds are often applied to resist oil and grease in fast-food wrappers or bakery boxes.
Testing Mechanism
Food stimulants like Tenax or food-grade solvents are placed in contact with the treated board at elevated temperatures to accelerate the diffusion process. The liquid is then analyzed using high-performance liquid chromatography to detect extremely low concentrations of fluorinated substances. This test confirms whether the protective barrier is sufficient to block chemical transfer.
Regulatory Compliance
International food safety authorities set strict limits on the permissible levels of these synthetic chemicals in paper products destined for food packaging. Brands require independent laboratory certification to demonstrate that their paperboard products do not release harmful amounts of fluorine-based substances into food. Many mills are transitioning to bio-based alternatives like starch or cellulose-derived coatings to eliminate this risk entirely while maintaining grease resistance.
This shift has led to the development of new testing protocols that verify the absence of any organic fluorine on the paper surface.