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Sheepskin dyeing black. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Here are the recipes sheepskin dyeing black.

Coloring with ursols, furrolls, logwood extract

The best results when staining black are obtained with the use of ursols and furrols, but these dyes are not widely available.

Coloring in black can be successfully done in the following bath:

  • Kampesh extract 500 g;
  • Yellow tree extract 100 g;
  • Acetic copper salt 25 g;
  • Water 200 l.

The skins are immersed in this solution and left there for 3-4 hours; the temperature of the solution should be maintained around 45 °C. After that, 100 g of commercial nitrogen-iron salt are added and the skins are left until they turn black (approximately 24-48 hours). In the factory, this dyeing method, in order to speed up the dyeing process, is carried out using several vats (6-8), in which there are solutions of various concentrations. Skins sequentially pass through all the vats. For an accelerated method of dyeing sheepskins black, the following two-bath method can be successfully applied; with this method, you must have four vats: 1, 2, 3, 4,

1 and 2 - Kampesh tree. 3 and 4 - Chromic.

The volume of each vat is about 2500 liters. Solutions are prepared as follows. In vat 1, 25 kg are dissolved, and in vat 2, 50 kg of log extract. In vat 3, 2,5 kg are dissolved, and in vat 4-5 kg ​​of two-chromopotassium salt. After the skins are treated with a bleach solution and washed, they are immersed in vat 1 for two hours. The temperature in the vat is kept around 45 ° C, but not higher. Next, the skins are taken out, allowed to flow and immersed in vat 3, where they lie for 1-0,5 hours, at a temperature not exceeding 35 °C. Then, after flowing around, they enter vat 2 for 2 hours at a temperature of 45 °C and finally into vat 4 at a temperature of 35 °C until a black color is obtained (approximately 1-2 hours). When dyeing the first batch, the concentration in vats 2 and 4 will decrease and become approximately the same as the initial concentration of vats 1 and 3. For the second batch of skins, vats 2 to 4 take the place of vats 1 and 3. Thus, the skins are loaded into vat 2, then into vat 4 At the same time, vats 1 and 3 are filled with a fresh solution, namely: take 150 kg of log extract for a vat, and 3 kg of chrompeak for a vat of 5. For subsequent batches, proceed in a similar way.

This two-tank method of dyeing sheepskins black gives a good color and is produced very quickly. After dyeing, the skins are allowed to flow, washed in warm water, the hair is cleaned with a solution of liquid soap in water, washed again and allowed to flow. Then, to replenish the loss in alum and salt (in the case of alum tanning), which were washed while the skins were in the dye vats, the skins are lightly covered with a solution of alum and salt, after which the skins are dried in a dryer.

To give softness and final finishing, the skins after drying are subjected to felting on a mesh drum. If desired, to obtain a great shine, you can treat the hair with a fat emulsion.

Dyeing black with ink nuts

Well defatted and white sheepskins are used for dyeing. Sheepskins are first pickled with a solution of 1,2 kg of iron sulfate in 1 bucket of water. The vitriol is dissolved in hot water and at a temperature of 50 ° C they lubricate the hair with this solution, carefully rubbing it with your hands to the root. Let it lie down and dry first at a temperature of 30 ° C, and when the hair dries, then at a temperature of 50 ° C. Next, the sheepskins are covered with a solution obtained by boiling in 1 bucket of water 400 g of ink nuts, 26 g of ammonia, 100 g of copper sulfate, the sheepskins are left to lie in heaps for 4-6 hours and dried. The dried skins are softened with warm water, allowed to lie, kneaded on a hook, and finally the skin is cleaned.

Coloring with "Black for Mezdra" or nigrosine

1 method:

Fat-free and white-skinned sheepskins are spread on the table with the skin up and smeared with a soft brush, rag or sponge with a solution composed of 40 g of paint dissolved in 1 liter of water. The paint solution is prepared as follows: a weighed amount of "Black for Mezdra" or water-soluble nigrosine is diluted with a small amount of warm water and heated to a boil with constant stirring, making sure that no lumps form. When the paint dissolves, add the required amount of water (10 g of paint 1 liter of water). The paint, heated to a temperature not exceeding 35 ° C, is smeared thickly on the mezra so that the whole mezra is soaked. To obtain a deeper black color, the skin of the sheepskin can be re-dyed with a solution of acid black M. This is followed by drying, spraying with water, kneading with hooks and, finally, finishing with a scythe on the block. You can also color the perch, and the hair is dyed dark gray. At the second finishing, after otminating, you need to sprinkle the mezra with garlic oil in half with kerosene: this achieves a thicker black color.

2 method:

Dissolve 4 g of fuchsin in alcohol and leave overnight in a warm place. Then this mixture is poured into half a bucket of warm water and, with the help of a brush or a rag, the raw tanned (after through oak) sheepskins are covered from the side of the mezra once. Then boil 30 g of black aniline in 1 bucket of water. When a film forms on boiling, 14 g of hydrochloric acid and 16 g of acetic acid are added and the mixture is boiled until the film disappears. With a hot solution (at a temperature of 50-55 ° C), sheepskins are dyed according to Magenta until the skin stops absorbing paint. After dyeing, the sheepskins are hung out to dry. Then they are washed for wool and bakhtarma. After washing, it is dried again, soaked in paint, crumpled with a hook, cleaned with pumice stone and sprayed with linseed oil. Spraying is most conveniently done with a spray gun. If there is no spray bottle, you can put oil in your mouth and sprinkle the sheepskin.

Author: Korolev V.A.

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