Cashmere Adulteration and the Test Methods That Survive a Dispute
Defending a cashmere claim demands LC-MS/MS proteomic proof tied to core samples that survive ISO 17025 cross-examination across two split lots.
Dehaired Down
Fibre Extraction
Mechanized carding separation isolates dehaired down from coarser guard hairs during primary scutching runs at the mill. This specific animal hair processing stage separates fine undercoat material from stiff outer fibres through targeted mechanical action. Mills verify the raw material purity during the initial intake inspection before any spinning machinery receives the batch.
Sorting supervisors check sample bundles under magnification to confirm the absence of contaminating hairs that might compromise yarn smoothness. Commercial buyers purchase these cleaned fibres by weight for luxury knitwear collections.
Thermal Rating
Laboratory guarded hot plate equipment measures the insulation capacity of manufactured garments containing dehaired down. This thermal resistance testing method quantifies trapped air pockets within the loft structure under controlled laboratory conditions. Technicians mount fabric swatches between temperature regulated plates to record heat transfer values per unit area.
Bulk production batches undergo random audit testing to ensure finished garments meet cold weather performance specifications. Mill guarantees depend entirely on these standardized thermal resistance outputs rather than subjective hand feel assessments.
Scouring Chemistry
Aqueous detergent immersion cleans residual animal grease from dehaired down during wet finishing operations. Chemical baths containing non-ionic surfactants remove natural lanolin without damaging the delicate protein structure of the fine undercoat. Temperature controllers maintain wash water parameters strictly below forty degrees Celsius to prevent fibre shrinkage.
Production managers adjust chemical concentrations based on titration results from incoming scour liquor samples. Mill laboratories reject lots exhibiting residual lipid levels above established threshold limits.
Grade Classification
Microscopic diameter evaluation sorts dehaired down into commercial quality categories prior to yarn spinning. Optical projection microscopes measure individual fibre widths in microns to establish fineness profiles for the entire lot. Graders record micron distributions to separate superior ultra-fine material from standard commercial grades.
Finished apparel tags display these verified micron measurements to inform wholesale purchasers about raw material pedigree. Market values fluctuate according to the measured fineness distribution within the certified batch.