| abstract |
(57) [Summary] [Structure] A dye fixing agent for use in a cellulosic fiber dyed with a reactive dye, which comprises the following general formula (1) and / or Alternatively, a dye fixing agent comprising a water-soluble polymer containing 35 to 90 mol% of the structural unit represented by (2). [Chemical 1] (In the formula, R 1 and R 2 represent a hydrogen atom or a methyl group, and X − represents an anion.) [Effect] According to the dye fixing agent of the present invention, chlorine fastness to a dyed product dyed with a reactive dye And dye fastness such as sweat fastness can be remarkably improved. |