| abstract |
The invention discloses a compound reducing agent which does not contain sodium hydrosulfite and has stable chemical potential. The composite reducing agent includes 30-75 wt% of thiourea dioxide, 60-20 wt% of reducing sugar, and 10-5 wt% of at least one chemical potential control agent: sodium nitrite, acrylamide, furfural, cyclohexanone and trichloroacetic acid. The use of the composite reducing agent realizes a dyeing process that combines pretreatment and dyeing procedures into one, reduces processing time, improves production efficiency, and the dyed finished product is evenly dyed, and the strength and feel are improved. |