DIN EN ISO 17234-1:2020 皮革. 测定染色皮革中某些偶氮着色剂的化学试验. 第1部分: 测定源自偶氮着色剂的某些芳香胺(ISO 17234-1-2020); 德文版 EN ISO 17234-1-2020
Leather - Chemical tests for the determination of certain azo colorants in dyed leathers - Part 1: Determination of certain aromatic amines derived from azo colorants (ISO 17234-1:2020); German version EN ISO 17234-1:2020