01 The slaughterhouse in the origin of raw leather will use industrial salt to pickle and preserve the fresh cow leather obtained from slaughtering Transportation and storage. Upon arrival at the factory, they shall be stacked and stored after inspection.
04 By adding alkaline materials, under the rotating action of the drum, the collagen fibers of the skin will be in an expanded state after loosening, which is convenient for the production of the next process (in the water immersed drum).
07 The tanning agent is added to the drum, and the tanning agent is combined with the leather fiber to give the cow leather corrosion resistance, stability, strength and elasticity. The tanned leather blank is blue, so it is called blue (wet) leather.
09Consolidate the previous (primary) tanning results, and make the leather fiber more elastic and soft by adding fatliquoring agent. The combination of dye and leather fiber makes the leather have the color required by customers.
10 The leather is laid flat on the workbench. Under the action of temperature and vacuum negative pressure, the leather fiber is compacted and shaped, and the grain surface is more flat and fine, so as to achieve the purpose of preliminary drying.