Method of transfer printing on fibrous materials, hydrophilic or mixtures of hydrophilic and synthetic fibrous materials by means of dyes scattered reactants or of optical brighteners sublimable

摘要

A transfer printing process for dyeing or optically brightening hydrophilic fibrous material and blends of hydrophilic and synthetic fibrous material with sublimable reactive disperse dyes or fluorescent brighteners, which process comprises the use of inert carriers that are treated with at least one reactive disperse dye or fluorescent brightener, which, during the heat treatment of the transfer printing process, has a vapor pressure higher than 10-5 Torr at temperatures above 160 DEG C., and treating the material to be printed with at least two compounds, one of which has a boiling point higher than 120 DEG C. and a solubility or dispersibility in water of at least 25 g/l at 25 DEG C., direct or with the aid of an auxiliary solvent or dispersant, and under the transfer conditions of the dyes or fluorescent brighteners is sparingly volatile, and the other is an acid acceptor, or with at least one compound that combines both functions simultaneously.