Difference between revisions of "Pickling"
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Revision as of 15:49, 20 November 2016
Bating and Pickling
Bating and the pickling make the fibres of the hide more receptive to tanning.
Bating
Hides are treated with enzymes, similar to those found in the digestive system, to degrade proteins. The hides become softer by this enzyme treatment. The duration of the bating process depends largely on the desired softness of the leather being produced. The softer the leather required, the longer the bating process.
Bird droppings and dog faeces have known to be been used for this procedure prior to the development of industrially produced chemicals.
Pickling
Pickling process makes the fibres of the hides more receptive to tanning. Pickling increases the acidity of the hide to a pH of 3, enabling chromium tannins to enter the hide. Salts are added to prevent the fibres from swelling. For preservation purposes, fungicides and bactericides are used.
Videos about the leather production
The leather production in a modern tannery.
| Process steps in the leather production |
|---|
| storage - soaking - liming - fleshing - splitting - pickling - tanning - neutralising - withering - sorting - shaving - yeing (through colouring) and fatliquoring - drying - finish - softening - final check |
| Tanning methods |
|---|
| Chrome tanning - Vegetable-tanned leather - Synthetic tanning - Tanning with fats and oils |
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