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See Chinese contents: GB/T 2910.25-2017 GB/T 2910.25-2017: Textiles -- Quantitative chemical analysis -- Part 25: Mixtures of polyester and certain other fibres (method using trichloroacetic acid and chloroform)
This Part of GB/T 2910 stipulates the method for determination of polyester fiber content of the bi-component mixture of polyester fiber and cellulose fiber (cotton, flax, ramie, viscose fiber, modal fiber, lyocell fiber, cupro ammonia fiber), animal hair fiber (wool, cashmere, etc.), synthetic fiber (polyacrylonitrile fiber, aramid fiber), after removal of non-fiber substances, by the trichloroacetic acid and chloroform method.
