| 摘要 |
PURPOSE: To obtain a dyed material having high color fastness, exhibiting a printing having a fine picture border and having excellent exhaustibility and sticking tendency even in deep dyeing by dyeing or printing a natural or synthetic polyamide fiber material with a sulfo group-containing reactive dye. CONSTITUTION: In dyeing a natural or synthetic polyamide fiber material with a reactive dye, a sulfo group-containing reactive dye expressed by the formula (M is a cation; R1 and R2 are each H or a 1-4C alkyl; X1 and X2 are eachα,β-dibromopropionyl,α-bromoacryloyl, chloroacetyl, mono-, di- or tri- halopyrimidinyl) is used, e.g. by utilizing its exhaustibility at pH 4-6, especially 4.2-5.3 at 80-100 deg.C for 30-120 min. The dye bath is cooled to at 75-90 deg.C after finishing of the dyeing, pH is adjusted to 8-9, especially 8.5 and treated with the dye for 10-20 min.
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