The tanning

The tanning in a tanning industry is the processing of leather tanning agents to impart plasticity, strength, wear resistance and other properties required in the development of leather and fur products; tanning agents reacting with the functional groups of linear polymers of the amino acid to form a stable cross-linking between collagen molecules themselves. The main types are mineral tanning (chromium, zirconium, titanium and others), fat, formaldehyde.

Skin tanning increases its resistance to rotting, warping, keeps pores when dried, and so on

Skin tanning increases its resistance to rotting, warping, keeps pores when dried, and so on.

Since ancient times, have been known two types of tanning substances, fats and processed products of ink nuts formed on the oak leaves with his infectious or parasitic diseases. These nuts are rich in tannin - tanning agent.

With wet skin (bull, calf, pig or rabbit), performing her tanned, otherwise it will deteriorate. Since ancient times, skin tanning happened during soaking in the decoction of oak bark. The oak bark contains the so-called tannins: gallic and tannic acid, tannin, etc. Now the skin tanning - is to use most of the synthetic substances. One often hears the expression "chrome leather" and "calf boots". What is the attitude towards them has metal chrome? chromium salts used in chrome tanning.

When handling raw leather tanning preparations collagen fibers are "stitched" molecules or ions. This gives structures that have huge amount of crosslinking.

In most cases, a tanning carried out in drum, rotating at a frequency of 8,4 1/min, 20-33 0C and atmospheric pressure. Depending on the kind of raw process time is 6-48 hours.

Skin tanning in some extent resembles the vulcanization of rubber.

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