Under the magnification of 30 times, leather can be seen as the surface of the earth, pit and hole, and its permeability is good. Leather for automobile needs special treatment such as wear resistance, light resistance and so on, and part of the pores will be covered.
5, cutting method
Cross cutting leather with razor blades, leather from outer layer to inner layer of color must be consistent (black appearance, deep gray inside, is a normal phenomenon). Pay attention to whether there is a color difference below the surface layer, so that you can avoid buying two times of second-hand leather that is dyed or changed.
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Cross cutting leather with razor blades
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