This part of ISO 1833 specifies a method using hot formic acid to determine the percentage of melamine fibres after removal of non-fibrous matter, in textiles made of binary mixtures of melamine fibres with cotton or aramid fibres.
ISO 1833-26:2013 history
2020ISO 1833-26:2020 Textiles — Quantitative chemical analysis — Part 26: Mixtures of melamine and cotton or aramide fibres (method using hot formic acid)
2013ISO 1833-26:2013 Textiles - Quantitative chemical analysis - Part 26: Mixtures of melamine and cotton or aramide fibres (method using hot formic acid)