A Coating Change That Invalidates a Food Contact Declaration
A raw material shift in barrier coatings alters chemical migration profiles, instantly invalidating food contact declarations and risking complete job quarantine.
Dual Use Food Additives
Regulatory Status
Chemical components present in packaging paper that perform an active technical function in food products fall under specific framework standards when migrating across the contact boundary. Regulatory frameworks treat dual use food additives as substances whose migration must satisfy both packaging material safety limits and food additive purity specifications. If a substance like calcium carbonate or glycerol transfers into a foodstuff, its concentration must remain within authorized direct addition thresholds.
European regulations mandate explicit declaration of these substances across supply chains to prevent inadvertent legal breaches.
Migration Process
Physical transfer of chemical agents from a paperboard matrix into food products depends on ambient moisture and contact temperature. The presence of dual use food additives in virgin or recycled pulp stocks requires precise tracking because their functional role in paper manufacturing, such as sizing or defoaming, does not exempt them from direct food laws. Volatile compounds migrate faster through open porous structures under warm storage conditions.
Converter audits evaluate migration limits through standardized solvent extractions and mathematical modeling. The total specific migration calculation incorporates both the background concentration from raw paper stock and any direct surface coatings.
Compliance Verification
Paper manufacturers issue declarations of compliance to confirm that chemical migration remains below legal caps. Third party laboratory testing confirms specific migration values against international limits. Compliance checks prevent unauthorized chemical accumulation in packaged food.