Leather dyeing method
A dyeing method and leather technology, which is applied in the field of leather dyeing, can solve problems such as poor blackness, heavy metal ions are not suitable for environmental protection, and large damage to the leather surface, achieving high dyeing rate and lifting power, perfect dyeing effect, and chemical damage. small effect
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[0026] Accurately weigh 7.5 grams of Decaisol Black B, 1.5 grams of Decaisol Orange R and 1.0 gram of Decaisol Yellow 3RS and thoroughly pulverize them, then mix and stir evenly to obtain a dye composition, and weigh from the prepared dye composition 2. 500 grams were placed in 100mL beakers, dissolved in water, transferred to a 250mL volumetric flask, and then washed with a small amount of water several times, transferred to a 250mL volumetric flask, diluted to the mark, and shaken for later use.
[0027] Weigh 10 grams of cowhide (accurate to 0.001 gram) and fully soak in distilled water until fully wetted.
[0028] Add 40ml of water and cowhide to the dyeing vat, stir for 5 minutes, add 50ml of dye solution, stir fully, put it into the XW infrared dyeing machine, then add 6ml of acetic acid with a mass concentration of 2%, start to heat up at a rate of 1-2°C / min , heat up to 50-60°C, keep warm for 30 minutes, add 10ml of formic acid with a mass concentration of 2%, and then...
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