Textile Roll Positional Sampling Basics for Incoming Compliance
Positional sampling across fabric width and core layers isolates hidden finishing gradients to prevent non-conforming textile lots from reaching production.
EN 14362 Azo Dye Testing
Chemical Safety
Standardized analytical methods identify the presence of restricted aromatic amines derived from azo colorants in textile fibres. Testing for these substances under en 14362 azo dye testing involves a reductive cleavage process that breaks down the dye molecules for gas chromatography analysis. This procedure is mandatory for any apparel intended for sale in the European Union to ensure consumer safety.
Analytical Procedure
Samples of the dyed fabric undergo treatment with a buffer solution and a reducing agent to release any banned amines. The en 14362 azo dye testing protocol specifies the exact temperature and duration for this reaction to ensure consistent results across different laboratories. After the extraction, the liquid is analyzed using mass spectrometry to confirm the identity and concentration of any detected compounds.
This level of precision allows the lab to distinguish between safe dyes and those that pose a carcinogenic risk.
Detection Threshold
Regulations set a limit of 30 parts per million for the concentration of these specific amines in the final product. Results below this limit are considered a pass, while any value above it requires the immediate rejection of the entire production lot.
Verification Protocol
Mills must provide these test reports as part of their technical file for every new colourway or fabric quality. Continuous monitoring ensures that the dyestuff used in bulk production matches the approved samples from the development stage.