Type Approval against Lot Conformity on a Repeat Order
Type approval certificates prove mill capability, while targeted lot indicator testing on repeat orders verifies shipment conformity before vessel loading.
EN ISO 16711-2
Testing Standard
International testing specifications establish standardized methods for measuring the release of heavy metals from textiles into human sweat. The en iso 16711-2 standard outlines a precise laboratory procedure using an acidic perspiration solution to extract metals from fabric specimens. This standard covers metals like nickel and chromium that might be present in dyestuffs or finishes.
Extraction Procedure
Laboratory technicians extract the target elements by soaking fabric samples in the simulated sweat solution for a specific period at body temperature. Following extraction under the en iso 16711-2 protocol, the liquid is analyzed using mass spectrometry to measure the exact concentration of released metals. This procedure simulates real-world garment wear and skin contact.
Chemical Compliance
Garment manufacturers must comply with the extraction limits defined by international brands to avoid shipment rejection at retail ports. Since en iso 16711-2 measures only the extractable portion of metals rather than the total metal content of the fabric, it provides a realistic risk assessment for dermal exposure during active wear. Dyehouses utilize these chemical results to prove that their metal-complex dyes are stable and do not leak hazardous substances under humid conditions.
Consumer Protection
Safety regulations rely on these test results to prevent skin irritation and long-term toxicity in consumers. Ensuring compliance with this standard protects infants and children who might chew on garments. This certification is a baseline requirement for eco-certified textiles.