Why does the dermis have the first layer and the second layer?

What is the real leather we often say?

People often say “leather” is a
common word in the leather product market, and it is a habitual name for
natural leather to distinguish synthetic leather. The use of animal skin for
manufacturing and processing, compared with artificial leather manufactured by
artificial use of chemical fiber materials, in the market is usually one of the
three types of top layer leather, second layer leather and synthetic leather.
And in terms of price, the three kinds of skins are gradually decreasing. It is
mainly processed from animal skins. There are many kinds of genuine leather,
various types, different structures, different qualities, and different prices.
Leather is a general term for all natural leathers. The cowhide itself is very
thick. In order to maximize the economy, the merchants cut the skin into two
layers, and there are also the sayings of the top layer and the second layer.

Although the first layer leather and the
second layer leather are both genuine leather, the feel, performance and price
are quite different. Let’s do a comparison.

What is scalp skin? What are its
characteristics?

The head skin is directly processed from
the raw skin of various animals, or the thick skin of cattle, pigs, horses and
other animal skins is depilated and cut into two upper and lower layers, and
the upper part with tight fibrous tissue is processed into various head Layer
leather, is the finest leather material. The top layer of the skin is mainly
composed of a dense and thin fiber layer and a slightly loose transition layer
that is closely combined with it, and has the characteristics of good
elasticity, strength and process plasticity.

The texture of the skin can be seen in the
scalp, and fine lines will appear when you press it with your hands. The top
layer of leather has the characteristics of good flexibility, breathability,
wear resistance and plasticity, and has high gloss and a very strong leather
feel, so the price is relatively expensive.

What is a double skin? What are its
characteristics?

Two-layer leather is the loose two-layer
part of animal skin. It is processed by spraying chemical materials or covered
with PVC and PU films. It is the cheapest kind of leather. The two-layer
leather is mainly composed of loose fibrous tissue layers, and can only be used
to make leather products after spraying chemical raw materials or polishing,
and also has a certain degree of natural elasticity and process plasticity characteristics,
but Relatively speaking, the strength will be slightly lower.

The appearance and gloss of the
second-layer cowhide are similar to those of the first-layer cowhide, but the
air permeability and wear resistance are far less than that of the first-layer
cowhide. The surface of the leather is easy to fall off and burst, and the
price is relatively cheap.