Process for di- or trichromic dyeing or printing

摘要

A method for di- or tri-chrome dyeing of natural or synthetic polyamide textiles comprises using a blue reactive anthraquinone dye (I) in conjunction with reactive yellow or orange dye(s) (II) containing sulpho (-SO3H) group(s) and/or reactive red dye(s) (III) containing -SO3H group(s). R1, R2 =H or optionally substituted 1-12 C alkyl; X1 = halogen; B1 = an organic bridging group; and V1 = an aliphatic or aromatic amine containing a fibre-reactive group. Also claimed are reactive anthraquinone dyes of formulae (IA), (IB) and (IC).