Quantitation of Residual Solvents in Industrial Polyurethane Coated Fabrics
Gas chromatography mass spectrometry quantitation of residual solvents in polyurethane fabrics demands liquid extraction to prevent border detentions.
ISO 17131
Microscopic Identification
Inspection protocols within the leather industry define the methodology for identifying hides through microscopic examination. Following iso 17131 allows technicians to distinguish between genuine animal hides and synthetic alternatives by observing the grain pattern and cross-section. The standard specifies the magnification levels and sample preparation needed for a clear view of the collagen structure.
Species Verification
Surface characteristics revealed under the microscope point to the specific animal used in the product. While iso 17131 does not replace DNA testing, it provides a fast and reliable way to confirm the presence of bovine, ovine, caprine, or porcine materials. This check is a commercial requirement for brands making specific leather claims on their labeling, ensuring that the consumer receives exactly what is stated on the product tag.
Testing Boundary
Procedures are limited to the physical identification of the hide. Chemical analysis of the tanning agents falls outside this specific protocol. It remains a tool for authenticity and does not measure chemical safety or durability.
Certification Requirement
Accredited laboratories must use these exact steps to produce valid inspection reports for retailers. Adherence to iso 17131 ensures that any claim of genuine leather is backed by a recognized international protocol. This consistency prevents disputes between tanneries and garment factories regarding material quality.