METHOD FOR DYING MIXED SUBSTRATE OF MODIFIED POLYACRYLONITRILE COTTON TYPE OR MODIFIED POLYESTER COTTON

摘要

The present invention relates to a process for dyeing mixed substrates consisting of fibers containing hydroxy groups and fibers containing sulfo and / or carboxy groups, wherein: a) is treated first the fibers of the substrate which contain hydroxy groups and which have been dyed with a reactive dye, by a polymeric product, and / P P b) then dye the substrate fibers which contain sulfo groups and / or carboxy with a basic dye. / p