Basic Knowledge Of Leather 1

(1) characteristics of natural skin

1, the smell of the real leather is thicker and thicker, generally larger than 1.0m/m, which is resistant to torture.

2, full of fine pores, good air permeability.

3. Dermis has obvious stratification and presents pitional state.

4. Good softness, luster and longitude. It is not easy to form after molding.

(two) natural skin thickness specification

1. The thickness is 0.8-1.0m/m, 1.0-1.2m/m, 1.2-1.4m/m, 1.4-1.6m/m and 1.8-2.0m/m.

2, commonly used thickness: 1.0-1.2m/m, 1.2-1.4m/m

(three) natural skin generally uses thickness.

1, sheepskin is more than 1.0m/m.

2, cowhide is more than 1.2m/m.

3, pigskin is more than 0.8m/m.

(four) types of commonly used natural skins

1, cattle skin: full handle, dense texture, and full of pores.

2. Korean cattle hide: the size and appearance are the same as that of cow skin (but the color is dark and hard).

3, cattle grinding surface: specifications 1.05-1.7m/m, 1.6-1.8m/m, feel like flannel, leather hard.

4, cattle skin: the fiber layer that is removed from the surface, can be used as anti fur or skin paint.

Paste PU film into dry PU nut skin.

5, sheepskin: thin pores, strong sense of value.

6, pig anti fur: soft, one side has hair, the other side is smooth, the skin pattern is clear, the thickness is 0.8m/m.

7, pig skin: hard handle, no texture.

(five) leather is distinguished by beads.

1. Pearl skin

2. Grinding surface

3.

(six) leather shoes are distinguished by coating types.

1, drum leather dyeing

The most natural touch, no adhesive, resin or paint.

Characteristics: keep natural style, but serious color difference, poor stain resistance, no fire retardant, solvent.

2, dyed skin

Coating without coating can keep the natural appearance.

Characteristics: natural pearls, but the chromatic aberration is still serious, and the finishing properties are not strong.

3. Leather dyed leather

Painting and a small amount of paint can make color difference and defect slightly improve, and still maintain a certain degree of touch and pparency.

4, paint skin

The paint is mainly made of paint, so that the color difference and defects can be obviously improved.

Characteristics: the surface is not natural enough.

5, embossed leather

Four kinds of spraying can be carried out, just embossing to improve or change the bead surface.

6, polished leather

Polished with glass rods to make the beads flat and delicate. Casein CASEIN can make the leather smooth and pparent, and is generally applied to small animal skins.

Characteristics: the color is pparent, the natural high gloss, the advanced taste, but the color difference is serious, the physical property is not good blood tendons obvious, the color of the oil spot is deeper.

7, Mo Guangpi

Smooth with a stone wheel or hair wheel to make the surface flat and glossy, and can be used for any skin.

8. Printing leather

Use rollers to print patterns on any kind of leather surface.

9, oil sensitive skin

Use a lot of fat to make the skin get special effects, such as PULL UP leather or feel oily.

It can be used on bead skin or suede skin NUBUCK.

10, PU COATING

The surface of leather can be fixed by polyurethane, so that the top of the skin can be coated with strong physical properties, which can imitate the bead surface, improve the value and have good physical properties.