GB/T 39621-2020 Textiles—Quantitative chemical analysis—Mixture of cross-linked lyocell fibres and viscose or cupro or modal (method using formic acid and zinc chloride)
2020GB/T 39621-2020 Textiles—Quantitative chemical analysis—Mixture of cross-linked lyocell fibres and viscose or cupro or modal (method using formic acid and zinc chloride)