( sorry, machine translation only )
Skin is intact, rotten or, moisture is missing becomes hard and can not be used as a material, such as a bag.
So, through the process of tanning, it will be stable leather.
The tanning, by coupling the fiber and tanning material of the skin, is the process of changing to a stable leather.
As a result, less likely to deteriorate, reborn to the softness, with a strength material.
The tanning material, there are mainly those used with the tannins of the plant-derived components (astringency) chromium (basic sulfate).
Tannin tanning the leather will become brown tannin, finished in durable while plump,
There is a feature that the taste enough to wear it out.
In some cases, however, take more than one month in the tanning, it is a way to take time and effort.
Chrome tanning is, in a way that was invented about 100 years ago, low water absorption, elasticity, is characterized by a certain flexibility.
Shorter the time it takes to tanning, but a lot of leather were using this method,
In recent years it has been concerned about the impact on the environment.
In addition to this is referred to as a tanning complex, and how to use a multiple of tanning solvent.,
There is also a method that does not use a chromium called tanning aldehyde.
In addition, old or fumigation, yes there was also a method that uses a salt and oil.
Formulation of this tanning material, in the big appeal of tanneries (tanning shop), will be on the characteristics of each tanneries.
Japan has to import most of the cattle of raw hides and skins, but there are powerful tanneries in the country.
Especially Himeji is famous, there is also leather, such as not only here.
Ended leather tanning, after this, go to the finishing process.
Related page about Basic knowledge of leather
The difference of cheap leather and high leather >>
The difference between European and Japanese leather >>
A kind of leather（Cow, Horse, Pig） >>
A kind of leather（Sheep, Deer, Goat, Ostrich） >>
A kind of leather（Snake, Lizard, Crocodile, Stingray, Shark） >>
From skin to leather -- Tanning -- >>
Leather finishing process >>