Process for dyeing natural or synthetic polyamide fibre...

Details Process for dyeing natural or synthetic polyamide fibre... Process for dyeing natural or synthetic polyamide fibre...

D - Textiles, Paper

06

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8/11

D06P 3/06 (2006.01) C09B 67/22 (2006.01) C09B 67/24 (2006.01) D06P 1/673 (2006.01)

Patent

CA 1273154

Process for dyeing natural or synthetic polyamide fibre materials with mixtures of dyes Abstract of the Disclosure A process for dyeing natural or synthetic polyamide fibre material from an aqueous liquor with mixtures of dyes, in the presence of an alkali metal salt or an ammonium salt and optionally in the presence of an assistant, which process comprises dyeing said fibre material with a mixture containing at least one 1:1 metal complex dye which contains sulfo groups and at least one metal-free dye which contains sulfo groups, in the presence of an alkali metal or ammonium fluoride, an alkali metal or ammonium fluorosilicate, an alkali metal or ammonium fluoroborate, an alkali metal or ammonium fluoro- zirconate or an alkali metal or ammonium fluorosulfonate, at a pH value in the range from 3 to 7. The process of the invention is suitable for producing non-skittery and level dyeings of good fastness properties on synthetic polyamide material.

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