Microscopic Standard
International test protocols define the procedures for identifying and measuring cashmere and other specialty animal fibers. This rule, known as Iso 17751, specifies the use of scanning electron microscopy and light microscopy to distinguish between fiber types. It provides a reliable method to identify fibers based on their surface scale structure and diameter distribution.
Analysis Procedure
Technicians prepare cross sections and longitudinal views of the fibers to analyze their physical dimensions and scale profiles. The scale height and scale frequency of wool fibers differ from those of cashmere under microscopic inspection. Computer software assisted image analysis helps the technician measure the parameters of hundreds of fibers to calculate the blend percentages.
This ensures that the analytical result is statistically reliable and can be used to resolve disputes between suppliers and buyers.
Fiber Selection
Specialty wool blends containing angora, mohair or cashmere require this verification to confirm the purity of the material. Cheap sheep wool can be mislabeled as expensive cashmere if the material is not checked at a certified laboratory. This test protects buyers from purchasing adulterated raw materials and finished goods.
Trade Protection
Customs agencies and brands rely on these test results to verify import declarations and prevent fraudulent claims. Accurate fiber identification ensures that duties are assessed correctly and that consumers receive genuine goods. It establishes a uniform test method that reduces disputes between suppliers and global textile buyers.
