SU566895A1 - Method of dyeing furs - Google Patents

Description

The invention relates to the fur industry and can be used in dyeing fur skins.

There is a method of reducing the natural color of furs by treating them in a solution of iron and copper salts 1.

However, this method gives a positive result only on the skins, which have a sufficient amount of natural pigment. On the skins of light brown positive results are not received.

A known method for enhancing the natural coloring of furs containing few pigments implies that after treating the skins in a solution of copper and iron, the skins are further dyed with vegetable dyes with hematoxylin and brasilein 2.

This method is associated with the use of expensive dyes.

There is also known a method of dyeing furs using benzene orthodioxy compounds with aromatic amines in a mordant.

3

However, this dyeing method does not improve the natural coloring of the fur coat of fur hides.

The aim of the invention is to improve the quality of furs, namely the improvement of the natural color of the fur skins.

This is achieved by the fact that after dressing fur skins with metal salts, they are treated with orthodioxy benzene compound — adrenaline, taken in a concentration of 1–5 g / l. At the same time, salts of copper, cobalt, nickel, manganese, titanium, and molybdenum are used as metal salts.

Example. After tanning, the skins by known methods are further processed following their solutions.

1. Treatment in aqueous solution, contain, eat, g / l:

Brown Black color

one

1 s

20-30 20

-thirty

Temperature 25-30 ° C, duration 3 bh, pH 7-11 (pH is adjusted with a 25% ammonia solution).

2. Treatment in aqueous solution, contain, eat, g / l:

Brown- Black color

Adrenaline25

Hydrogen peroxide

(30% n. A -) 25

Claims (3)

Cooked salt2020 Temperature 25-30 ° С, duration 3-6 hours, pH 7-11. Further processing by current technology. Depending on the concentration of the reagents used, any degree of natural blackening to a black color can be obtained. Instead of dosing, aerosol treatment of the skins with the above solutions can be applied. Using the proposed method allows to improve the natural light brown color of fur skins to dark brown and black. Claim 1. The method of dyeing mech by pretreatment with salt (metals and orthodioxication: be) nzola in the presence of an oxidant, differs by the fact that, for the purpose of improving kanestrohex, as an orthodioxidomer of benzene, adrenaline is used -5 g / l. 2. A method according to claim 1, characterized in that ROLS of copper, cobalt, nickel, manganese, titanium, and molybdenum are used as metal salts. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 316801, D 06P 1/10, 1971. 2. The patent of Hungary No. 158304, C 14B 15/2, 3. USSR author's certificate No. 76626, D 06P 3/30, 1949.