Difference between revisions of "Tannins"
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| − | + | Tannins are chemicals used by [[tanner|tanners]] to prevent the disintegration of the collagen fibres of the leather. These chemicals are absorbed by the hides and skins during the [[leather production|tanning process]]. They bind to the protein collagen in the skins and prevent the disintegration of the fibres by turning them into [[leather]]. Without this, the skins would decompose. A variety of tanning agents are used for tanning but the three main types of tanning are [[Vegetable-tanned leather|vegetable tanning]], which involves the use of plant substances, [[Chrome tanned|chromium III]] and [[Synthetic tanned|synthetic]] tanning. Finished leather contains about 8 to 45% of tannins. | |
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</p> | </p> | ||
<p align=center> | <p align=center> | ||
| − | '' | + | ''Different tanning agents: [[Synthetic tanned|synthetic tannins]], [[Chrome tanned|Chrom III]], [[Quebracho]] (vegetable tannin).''<br></p> |
<p> </p> | <p> </p> | ||
| − | == | + | == Tannins - Tanning agents == |
| − | '''[[ | + | '''[[Mineral tanning|Mineral tanning agents]]''' |
| − | * [[ | + | * [[Chrome tanned|Chrom III]] |
| − | * [[ | + | * [[Tawing with alum]] |
<br> | <br> | ||
| − | '''[[ | + | '''[[Vegetable-tanned leather|Vegetable tanning agents]]''' |
| − | * [[ | + | * [[Apple tanned]] |
* [[Mimosa]] | * [[Mimosa]] | ||
| − | * [[ | + | * [[Olive leather|Olive leaves]] |
* [[Sumach]] | * [[Sumach]] | ||
* [[Tara]] | * [[Tara]] | ||
* [[Quebracho]] | * [[Quebracho]] | ||
<br> | <br> | ||
| − | '''[[ | + | '''[[Synthetic tanned|Synthetic tanning agents]]''' |
| − | * [[ | + | * [[Synthetic tanned|Synthetic tanning agents]] |
<br> | <br> | ||
| − | '''[[ | + | '''[[Tanning leather|Types of tanning]]''' |
| − | * [[ | + | * [[Chrome tanned|Chrome tanning]] |
| − | * [[ | + | * [[Vegetable-tanned leather|Vegetable tanning]] |
| − | * [[ | + | * [[Synthetic tanned|Synthetic tanning]] |
| − | * [[ | + | * [[Chamois leather]] |
| − | * [[ | + | * [[Tawing with alum]] |
| − | * [[ | + | * [[Brain tanning]] |
Revision as of 17:59, 3 December 2016
Tannins are chemicals used by tanners to prevent the disintegration of the collagen fibres of the leather. These chemicals are absorbed by the hides and skins during the tanning process. They bind to the protein collagen in the skins and prevent the disintegration of the fibres by turning them into leather. Without this, the skins would decompose. A variety of tanning agents are used for tanning but the three main types of tanning are vegetable tanning, which involves the use of plant substances, chromium III and synthetic tanning. Finished leather contains about 8 to 45% of tannins.
Different tanning agents: synthetic tannins, Chrom III, Quebracho (vegetable tannin).
Tannins - Tanning agents
Videos about the leather production
The leather production in a modern tannery.
The leather production with tannins of the oak.
Chamois leather production in Germany.
| Tanning methods |
|---|
| Chrome tanning - Vegetable-tanned leather - Synthetic tanning - Tanning with fats and oils |
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