DIN EN ISO 1833-18:2021 纺织品. 定量化学分析. 第18部分: 丝绸、羊毛或其他动物毛发的混合(硫磺酸法)(ISO 1833-18-2020); 德文版本EN ISO 1833-18-2020
Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with wool or other animal hair (method using sulfuric acid) (ISO 1833-18:2020); German version EN ISO 1833-18:2020
This document specifies a method, using sulfuric acid, to determine the mass percentage of silk, after removal of non-fibrous matter, in textiles made of mixtures of silk with wool or other animal hair.