Process: Color defective cloth → rolling potassium permanganate (18g/L) → water washing → rolling oxalic acid 20g/L, 40℃) → water washing and drying
36°NaOH 1%~3%; Perchlorate 15%~20%; synthetic detergent 5%~8%; bath ratio 1:25~30; 98~100℃; 20~30min (until all color is removed). After all color is removed, gradually cool down, wash thoroughly with water, then use 0.5ml/L acetic acid at 30℃ for 10min to fully neutralize the alkali remaining on the nylon, and then wash with water.
1766The dye penetrates the yarn fibers, coloring them thoroughly, which results in vibrant and long-lasting colors.