Difference between revisions of "Tannins"
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! bgcolor=#eeeeee | [[Leather production|Process steps in the leather production]] | ! bgcolor=#eeeeee | [[Leather production|Process steps in the leather production]] | ||
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| − | | bgcolor=#ffffff align=center | [[storage of leather|storage]] - [[soaking]] - [[Liming - Leather Tanning|liming]] - [[Fleshing - Making of leather|fleshing]] - [[Split leather|splitting]] - [[pickling]] - [[Tanning leather|tanning]] - [[neutralising]] - [[Drying leather|withering]] - [[Leather production#Sorting|sorting]] - [[shaving]] - [[Leather production#Dyeing (through colouring) and fatliquoring| | + | | bgcolor=#ffffff align=center | [[storage of leather|storage]] - [[soaking]] - [[Liming - Leather Tanning|liming]] - [[Fleshing - Making of leather|fleshing]] - [[Split leather|splitting]] - [[pickling]] - [[Tanning leather|tanning]] - [[neutralising]] - [[Drying leather|withering]] - [[Leather production#Sorting|sorting]] - [[shaving]] - [[Leather production#Dyeing (through colouring) and fatliquoring|dyeing (through colouring) and fatliquoring]] - [[Drying leather|drying]] - [[finish]] - [[softening]] - [[Leather quality|final check]] |
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Revision as of 11:08, 5 February 2017
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, Chrome 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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