Leather - Chemical determination of chromium(VI) content in leather - Part 1: Colorimetric method (ISO/DIS 17075-1:2015); German and English version prEN ISO 17075-1:2015
Leather - Chemical tests - Determination of chromium(VI) and the reductive potential for chromium tanning agents (ISO 19071:2016); German version EN ISO 19071:2016— 12 стр.
Leather - Chemical determination of chromium(VI) content in leather - Part 1: Colorimetric method (ISO 17075-1:2017); German version EN ISO 17075-1:2017— 17 стр.