Procedure for obtaining black dyes on cellulose materials. (Machine-translation by Google Translate, not legally binding)

摘要

Process for obtaining black dyeings on cellulose materials, characterized in that a mixture of azo dyes of the composition ** (See formula) ** or its alkali metal salts, if appropriate in a mixture with other tinting dyes, is diazotized on the fiber and is combined with coupling components that are free of sulphonic acid groups. (Machine-translation by Google Translate, not legally binding)