- Soaking. Harvest the skin right after osvezevanje until she steamroom. If the skin is dry without processing, it should soak. Doing this for softening and removing scrapings. First, examine the skins, remove large debris from the skin and turn flesh side up. Now you need to prepare a solution for soaking. You need to come out of the liquid coefficient of skins. For example, dry preserved rabbit skin has a LCD 20, which means that 50 grams of the skins will have 1 liter of fluid. Microconstituent the rabbit skin has a LCD 8-9, shakesperean skins sheep – LCD 10. Calculation of liquid-based LCD allows you to reduce costs in the chemicals and ensures the uniform soaking of the skins. If the LCD is unknown, the solution is prepared in such a way that the skins in it are easily rotated and not rubbing up against each other.
A solution was prepared from a sodium salt and an antiseptic. It can be a ZnCl( 2 g/l), furatsilina (1 tablet) or formalin (1G/l). Perhaps, instead of antiseptic to use acetic acid (5-7G/l). The amount of salt each individually, the average is 30-50 g/L. immersed Into the solution of the skin and removed after 12 hours. If the skins do not become softer, not like the pair, you need to leave them for some time.
The fleshing. This process aims to rid the skin from the remnants of meat and fat, and also excess layer of the skin. Processing do on fleshing machine or the deck, turning the stocking inside out skins. The scrapings come off the iron with a brush or a dull knife. The surface must be leveled to prevent damage to the skin. Process starting from the rump towards the head.
Wash. Mosley fleshing, the skins are washed in the solution. To prepare it, you need to take the detergent (privatel) or washing powder 3G/l, salt 20g/l. the Skins are immersed in the solution for 5 minutes, drained and then placed in a solution of pikel.
Perelivania. This process involves immersing the hides in a solution of salt and acid. Acid loosens the skin fibers, making them ductile and malleable. After perelivania the skin can stretch in any direction. Mainly used acetic, formic or lactic acid, which give the best results. The pickle solution consists of 50 g of salt and 15 g of acetic acid (or 5 g of formic acid) to 1 liter of water. The skins immersed in the solution and after 12 hours get. Skins all the time mix. Check the readiness of the skins of bending the skin and squeeze. After deployment, on the site of the bend should be a white stripe.
Tanning. It is necessary to give skin strength. As the tanning agents used for joining of aluminium, chromium, titanium, iron, tannins, formaldehyde, etc. Chrome liquor is used most often for its preparation take 50 g of salt, 6 g of chrome tanning agent in 1 litre and dissolve in very hot water. The skins in the tanning agent leave for 12-24 hours, stirring constantly.
Greasing. It gives the skin Shine. The utility bills are prepared from 100g salt 25g глицерина20 g of ammonia 70 g of yolk in 1 liter of water. The solution is heated and applied with a brush, then the skins are folded flesh side to flesh side.
Drying. The skins are drained in a centrifuge, and then be dried in heat chambers for drying at t 40-45℃. In conclusion, the skins roll back in the dryer with sawdust, fur thus polished, then the skins MNU in special drums, skins and several stretch.