nba2k16交易球员步骤:什么是皮革

皮革定义

Leather is a material created through the tanning of hides, pelts and skins of animals. Leather was a very important clothing material, and its other uses were legion. Together with wood, leather formed the basis of much ancient technology. Leather with the fur still attached is simply called fur.
Leather is decorated by leather carving, leather stamping, leather embossing, pyrography, beading, dying of leather or painting on leather.

Today, most leather is made of cow hides, but many exceptions exist. Lamb and deer skin are used for soft leather in more expensive apparels. The leather made from some more exotic skins has during different times in history been considered very beautiful. For this reason certain snakes and crocodiles have been hunted to near extinction.

In the 1990s, farming of ostriches and emus for their meat became popular. As a side product, ostrich leather became a fad for a while. Ostrich leather has a characteristic "goose bump" look because of the large follicles from which the feathers grew.

In Thailand, sting ray leather is used in wallets and belts in the same way as regular cow leather. Sting ray leather is as tough and durable as hard plastic, even a metal file cannot leave a scratch. The leather is often dyed black and covered with tiny round bumps in the natural pattern of the back ridge of an animal. These bumps are then usually dyed white to highlight the decoration.

Leather fetishism is the name popularly used to describe a fetishistic attraction to people wearing leather, or in certain cases, to the garments themselves.

A number of rock groups, particularly Heavy Metal groups such as the Scorpions and Judas Priest are known for wearing leather clothing.

Ethical vegetarians and vegans avoid the use of leather for moral reasons.
值得指出的是,日本所谓的“人工皮革”产品,其定义比较模糊,开始是以非织造织物为基布、经PU浸渍、涂层后生产的产品称为人工皮革。

简单的说皮就是动物身上长的皮，主要是皮肤的真皮层，没经过处理。
革就是皮经过一个复杂的物理化学过程得到成品。革的种类很多，比如做鞋的叫鞋面革，做服装的叫服装革，还有家具革，汽车座垫革等等。
皮到革的过程称为制革。这个过程非常复杂，大致要经过浸水，脱脂，浸灰，脱灰，软化，浸酸，鞣制，复鞣，中和，染色加脂，涂饰等过程。
补充一点，所谓的皮革都是来自动物身上的，而合成革并不能叫做革，属于化工的高分子材料类。