1 Identification methods include hand, visual, c […]
1 Identification methods include hand, visual, combustion, microscopy, dissolution, drug coloring, and infrared spectroscopy. In the actual identification, it is often necessary to use a variety of methods, comprehensive analysis and research to arrive at the results.
2 The general identification steps are as follows:
A. First, natural and chemical fibers are identified by combustion.
B. If it is a natural fiber, microscopic observation is used to identify various plant fibers and animal fibers. If it is a chemical fiber, the difference in melting point, specific gravity, refractive index, and solubility of the fiber is distinguished one by one.
C. When identifying mixed fibers and blended yarns, it is generally confirmed by microscopic observation that several fibers are contained therein, and then identified one by one by an appropriate method.
D. For dyed or finished fibers, it is generally necessary to carry out dye stripping or other appropriate pretreatment to ensure reliable identification results.