Azo dye transfer process with a pyridine coupling component.

摘要

Azo dye transfer process from a carrier to a plastic-coated paper by diffusion, using a thermal head, a carrier being used in which are found one or more azo dyes of the formula

in which D stands for the radical of a diazo component and
R<1>, R<2> and R<3> independently of one another denote hydrogen, optionally substituted alkyl, optionally substituted phenyl or optionally substituted cyclohexyl and
R<4> denotes alkyl.