| 摘要 |
Compositions comprising (a) a cationic surfactant which per se acts as a reserving agent in the dyeing of substrates dyeable with anionic dyes, or a mixture of such surfactants and (b) a cationic surfactant which per se acts as a retarder in the dyeing of polyacrylonitrile with cationic dyes, or a mixture of such surfactants and which may contain further components, are eminently suitable as reserving agents for substrates dyeable with anionic dyes.
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