Leather - Chemical tests - Determination of water-soluble matter, water soluble inorganic matter and water-soluble organic matter (ISO 4098:2006); German version EN ISO 4098:2006— 12 стр.
Leather - Chemical determination of chromic oxide content - Part 1: Quantification by titration (ISO 5398-1:2018); German version EN ISO 5398-1:2018— 14 стр.
Leather - Chemical determination of chromic oxide content - Part 1: Quantification by titration (ISO 5398-1:2007); German version EN ISO 5398-1:2007— 11 стр.