The invention relates to a
crocodile skin clean leather-making
processing method. In the existing leather-making process, the problems of
chloride ion contamination, excessive
sulfide in a waste liquid, high
chromaticity of
dyeing wastewater, difficulty in the thickness adjustment of the
crocodile skin and the like are more serious. The
crocodile skin clean leather-making
processing method comprises the following steps of soaking the fresh crocodile skin in
saline water, rolling salt, preserving, transporting, classifying, grouping and batching, bundling, weighing, pre-soaking, soaking, removing meat,
degreasing, pre-liming, liming, brushing scale, deliming, carrying out primary combined bleaching,
softening, carrying out secondary combined bleaching,
softening oracle bone,
pickling,
softening, tanning, fluffing leather,
degreasing, rinsing, neutralizing, re-tanning,
dyeing, greasing,
drying on a
nail plate, scrubbing the leather and finishing. By the crocodile
skin clean leather-making
processing method, the usage amount of salt can be greatly decreased in the aspect of
corrosion resistance of raw crocodile skin, the crocodile skin is convenient to transport, the content of S<2-> in the waste liquid and the
chromaticity of the waste liquid are effectively decreased, the thickness of the leather can be precisely adjusted and the high-brightness leather can be obtained by virtue of finishing. The crocodile skin produced by the clean production process has clear pattern and the shrinkage temperature and physical and mechanical properties can reach the national standards.