真皮座套的鉴别
Identification of dermis
手摸：即用手触摸皮革表面，如有滑爽、柔软、丰满、弹性的感觉就是真皮；而一般人造合成革面发涩、死板、柔软性差。
Hand touch: touch the surface of leather with hand, such as smooth, soft, plump, elastic feeling is true skin; and generally synthetic synthetic leather face is astringent, rigid and soft.
眼看：真皮革面有较清晰的毛也、花纹，黄牛皮有较匀称的细毛孔，牦牛皮有较粗而稀疏的毛孔，山羊皮有鱼鳞状的毛孔。
Look: the leather leather has a clearer hair and pattern, the Yellow cowhide has a more symmetrical pore, the yak skin has coarse and sparse pores, and the goat skin has fish scale pores.
嗅味：凡是真皮都有皮革的气味；而人造革都具有刺激性较强的塑料气味。
Smell: all leather has the smell of leather, and artificial leather has strong odor of plastic.
点燃：从真皮革和人造革背面撕下一点纤维，点燃后，凡发出刺鼻的气味，结成疙瘩的是人造革；凡是发出毛发气味，不结硬疙瘩的是真皮。
Kindling: a bit of fiber from the back of the leather and the artificial leather. After the light is ignited, the pungent smell is made, and the lump is made of artificial leather.