Testing Classification
Standardized chemical test media mimic the extraction behavior of real foodstuffs during laboratory migration assessments of packaging materials. Because actual food products exhibit complex physical structures that impede analytical quantification, a food simulant provides a chemically defined medium to test overall and specific migration from paper, board, and plastic coatings. The European regulatory framework defines specific test substances representing aqueous, acidic, alcoholic, and fatty food categories.
Testing applies to finished packaging, interior dispersion barriers, and direct-contact treated papers. The classification does not extend to dry foods that exhibit no fatty surface characteristics, which instead require solid porous adsorbents like modified polyphenylene oxide for gaseous migration testing.
Chemical Selection
Laboratory technicians select extraction media based on the physical and chemical properties of the target foodstuff. Under standardized testing rules, food simulant A (ten percent ethanol) models aqueous foods, simulant B (three percent acetic acid) tests acidic environments, and simulant C (twenty percent ethanol) evaluates alcoholic products. For fatty foods, simulant D1 (fifty percent ethanol) and simulant D2 (vegetable oil or alternative synthetic triglycerides) simulate lipophilic extraction dynamics.
Paper and board substrates with functional polymer linings are exposed to these liquids under prescribed time and temperature conditions in migration cells. High-temperature filling or long-term ambient storage requires elevated testing temperatures to accelerate mass transfer mechanisms. Gravimetric analysis measures overall migration, while chromatographic techniques quantify specific migrant molecules extracted into the simulant liquid.
Validation Protocol
Sourcing departments verify that barrier-coated paperboard grades possess valid laboratory migration reports using appropriate simulants before approving commercial roll purchases. Packaging engineers match the intended grocery packaging application against the specific food simulant utilized during laboratory compliance testing. Mismatches between simulant properties and target food characteristics invalidate compliance documentation and expose packaging converters to regulatory penalties.
Certified test results provide verifiable technical evidence required for regulatory safety declarations.
