Tannins

From www.leather-dictionary.com - The Leather Dictionary
Jump to: navigation, search

LEATHER-DICTIONARY.jpg


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.


Gerbstoffe-01.jpg

Different tanning agents: synthetic tannins, Chrome III, Quebracho (vegetable tannin).

 

Tannins - Tanning agents

Mineral tanning agents


Vegetable tanning agents


Synthetic tanning agents


Types of tanning



Videos about the leather production


The leather production in a modern tannery.



Brain tanning.



The leather production with tannins of the oak.



Chamois leather production in Germany.


Process steps in the leather production
storage - soaking - liming - fleshing - splitting - pickling - tanning - neutralising - withering - sorting - shaving - dyeing (through colouring) and fatliquoring - drying - finish - softening - final check


Tanning methods
Chrome tanning - Vegetable-tanned leather - Synthetic tanning - Tanning with fats and oils


Colourlock-GB-03.jpg

WE UNDERSTAND LEATHER - WWW.COLOURLOCK.COM