| abstract |
The present invention relates to a kind of leather coloring techniques, including (1) dyestuff to prepare：Dyestuff is weighed in proportion, is ground mixing, accurately dissolves the milled mixtures of gained with water, waits for full and uniform obtaining dye solution；(2) raw material preparation：Leather is weighed, carries out immersion 1-2 hours to it with distilled water, then washing 30-40 minutes is carried out to the leather impregnated with water, washing amount is 300%, and leather cleaning solution is added later and cleans 20 30min；(3) it dyes：Ready leather and dye solution are placed on inside dye vat, 38 42 DEG C, 80 120% water are added in rotary drum, 3 6% acrylic resin retanning agent is added；(4) it dries：It goes after water, takes the dish out of the pot through hyperchromatic leather, be placed in all good place of ventilation and sunlight conditions and dried. |