Low-salt reactive dyeing of cotton modified with FK-316

The modification is applied to cotton knitted fabric with cationic agent FK-316,and then reactive dyeing with low-salt is carried out.The optimal conditions of modification and low-salt dyeing are settled.The modifying process is modifier FK-316 5%(omf),pH value 9.0,holding 20 min at 70 ℃.The low-salt dyeing process is reactive dye 1%(omf),sodium sulfate 20 g/L,liquor ratio 1∶15～1∶20,dyeing 50 min at 60 ℃,fixing for 50 min with 20 g/L soda ash.When the amount of the dye is equal to or less than 2%,the salt dosage can be reduced to the 1/3 of that in conventional dyeing.The dyeing depth and color fastness are the same with those in conventional dyeing with salt.