| 摘要 |
PURPOSE:The titled composition capable of carrying out dyeing in the same hue and color depth as those at an initial stage of preparation even after long- period preservation, obtained by blending C.I. reactive blue 21 with epsilon- caprolactam and N-methylpyrrolidone. CONSTITUTION:(A) 10-50wt% C.I. reactive blue 21 is blended with (B) 0.1-10wt% epsilon-caprolactam and/or N-methylpyrrolidone, and (C) 89.9-30wt% water, usually by adding the component B to an aqueous solution of the component A, to give the aimed composition. Preferably, the aqueous solution of the component A is to be adjusted to 4.5-5.5pH.
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