Standard Scope
German food contact regulations set explicit safety requirements for paper and board materials intended for use under high temperature conditions during cooking or baking. Compliance with bfr recommendation xxxvi-2 ensures that paper matrices undergoing thermal stress release no harmful extractable substances into food matrices. The guideline applies specifically to filter papers and ovenable boards manufactured from primary or recycled fibres.
Its reach terminates where plastic coatings or aluminum foil barriers exceed fifty percent of the total package weight.
Thermal Boundary
Ovenable paper substrates undergo structural degradation under high heat. Under bfr recommendation xxxvi-2 protocols, paperboards are tested using modified polyoxymethylene at elevated temperatures. Fibres must remain intact without scorching or transferring odours.
Chemical Migration
Migration limits govern volatile organic compounds, formaldehyde release, heavy metals and specific antimicrobial agents. Paper mills satisfy bfr recommendation xxxvi-2 by restricting wet-strength resins and crosslinking agents during stock preparation. Binders added during size press application must appear on the approved positive list published by health authorities.
Laboratory testing requires solvent extraction followed by chromatographic analysis to verify that extractable substances remain below toxicological thresholds. Uncoated kraft papers intended solely for dry room temperature storage fall outside this high temperature regulatory framework.
