EN 13432

Chemical Limit

Heavy metal thresholds and ecological safety parameters within EN 13432 restrict the concentration of copper, nickel, zinc, and fluorine additives used in printing inks. Recycled cellulose fibres sourced from old corrugated containers occasionally carry residual contaminants exceeding these strict statutory limits. Paper mills test aqueous dispersions and wet strength resins regularly to prevent prohibited elements from entering the finished paper reel.

Laboratory personnel measure seedling emergence rates using compost samples containing degraded packaging fragments to prove the absence of phytotoxic compounds. Ink formulations containing heavy pigments fail ecotoxicity screens immediately, forcing converters to adopt water based printing systems.

Conversion Tolerance

Thermal processing temperatures during the lamination of biodegradable films must remain within tight operational tolerances to preserve compostability traits defined by EN 13432. Excessive heat applied during extrusion coating alters polymer structures permanently, preventing microorganisms from digesting the substrate inside industrial composting plants. Quality control managers monitor nip roll pressures and drying tunnel temperatures continuously during production runs.

Substrate shrinkage observed during conversion alters the physical dimensions of coated barrier papers, which introduces variances into downstream bag making machinery. Converting lines operating at higher speeds reduce dwell times, occasionally leaving thermosetting adhesives partially uncured and non compliant with biological degradation standards. Biodegradable packaging materials undergo rigorous testing before commercial distribution begins.