真皮鉴别知识（Dermal identification knowledge）.doc

真皮鉴别知识（Dermal identification knowledge） Dermal identification knowledge 1: identify dermal Touch: touch the leather surface, such as a smooth, soft, plump and elastic feeling is dermis; and general synthetic leather surface astringent, rigid, soft and low. Eyes: leather leather surface has a clearer hair, but also patterns, yellow leather has a more symmetrical thin pores, yak skin has coarse and sparse pores, goat skin has fish scaly pores. Smell: all leather has the smell of leather; and synthetic leather has a pungent smell of plastic. Lit: from the true leather and synthetic leather, tear off a bit of fiber, after ignition, where a pungent odor, forming a pimple is artificial leather; hair hair smell, not hard knot is the dermis. 2. Identification of synthetic leather and synthetic leather With these four basic methods of identification, the identification of synthetic leather and synthetic leather is obvious. In addition, synthetic leather and synthetic leather have the following characteristics: 1, press the leather surface with your fingers, there is no obvious pores wrinkles, such as wrinkles after compression, it will not naturally disappear. 2, leather surface without pores, which is an important feature of identifying leather genuine and false. 3, cut the corner burning smell, but the hair burnt smell. 3, what is the difference between cattle leather, pig leather, horse leather and sheep leather Different types of leather, their characteristics and uses are also different. For example, cattle leather surface is thin, high strength, the most suitable for leather shoes, leather goods; sheepskin leather light, thin and soft, leather clothing is the ideal fabric; pig leather breathable, permeable steam performance better. Pig leather: round surface and coarse pores, inclined into the leather. The pores are arranged in three groups, and the leather surface presents many small triangular patterns, Bovine leather: yellow cattle leather and buffalo leather are ca