Soaking

Soaking is usually the first and important step in the Tannery Irimagzi. Previous , the raw material must be carefully dehydrated before it is extendet to an mechanical processing.

Limming the leather

The Leather products are treated to remove the hair and wool from the skin surface (analogue to woodgrain). Conventionally , the hides are treated with sodium sulphide and hydrated lime, to destroy the keratinous material on the epidermis, wool and hair. Fats   are  hydrolised due to the increased ph value. Water drawn into the fibre network, the skin structure swells on and form a turgid open-structure, translucent and jelly-like material. After the last wash the leathers are ready for the Pre-Tannery process. In the Pre-Tannery process, the leather be dippede in a solution of mimosa and cebroka for 7 days.

 

Tannage the  leather

The main tannage has the primary function of producing an utilisable material resistant to microbial attack.

For the processed leathers , two ways of tannery is defined;


 

Rapid tannage


Rapid tannage process in drums
After the pre tannery, the leathers are processed with chestnut, 
mimosa and cebroka valeks.With the mechanical effect, the tannery 
materials will slowly penatrate into the leather.


Slowly tannage

Due to the long and challenging tannery period the traditional 
tannery is the expensive method.
The leathers tanned in this way are very solid and waterproof. 
The leathers are processed in the below stages;


After the pre tannery, the leather has to be infused into the oak 
solutions for 3 months.
After the pre tannery in the pits with herbal oak solutions, for bonding
the leather with bark,chestnut, mimosa and cebroka is also added in 
the tannery cabins
To satisfy the most demanding clients, we reserve special treatment 
for butts, which are tanned for twelve months (oak-bark ground-tanning). 

Retanning the leather

After this stage the same processes are used  for the both tannery methods. The tanned leather is subjected to additional tannages with similar or new tanning materials. These agents may be used to lighten the  of the leather, to produce a feeling of fullness and to aid in the penetration . The choice of pre tanning, tanning and retanning chemicals is dependent on the properties desired in the final leather, and therefore, on the properties required in the final leather product.

Respectively mechanical processes

 

SAMMYING MACHINE 
SHAVING MACHINE 
SETTING OUT MACHINE
ROLLPRESS
SOLE LEATHER ROLLING MACHINE 

Finishing  the leather

After this process the leathers dry in the special drying cabins.For thighten and compact  the the dried Soles, there is a cylinder machinery stage. Regarding to the demands, there can be also used the buffing process.After this the leathers are classified into the thickness groups regarding to our customers demands.