DE433154C - Process for the production of colored and black etch prints on leather and artificial leather - Google Patents

Description

Process for the production of colored and black etched prints on leather and synthetic leather. The production of colored and black printed leathers was up to now only possible in such a way that the printing ink in the form of an opaque pigment with suitable Fixatives by printing or spraying using stencils on the already dyed leather was attached.

It now became apparent that the method practiced in stuff printing was and black etching prints on cooked vegetable and synthetic ones and mineral tanning agents tanned leathers can be made possible by the fact that Etchants, such as. B. Zinc formaldehyde sulfoxylate compounds, hydrosulfite preparations among other things, as well as oxidation colors with oxidants of all kinds that damage to the leather does not occur and the steaming time to @% Min. Can be reduced.

The cookable leathers are colored with suitable dyes and printed with etching pastes after drying, «-elche with etch-resistant dyes as well as mineral and artificial pigments, color lakes or the for Formation of the components required for oxy (lation), such as aniline salt, sodium chlorite etc., can be moved. After the print has dried, a steaming time of is sufficient ilj, min. to fix the etch-resistant dye securely in leather.

Example i.

One with a dye mixture of 0.4 percent 2-naphthylamine-q., 8-disulfonic acid - m-toluidine-an-toluidine-nitrophenylenediamine and aminosalicylic acid-a-naphthylamine-2-amino-8-naphthol-6-sulfonic acid and 0.2 percent aminoazobenzenesulfonic acid in-toluidine-m-toluidine (phosgenated) colored Bastard leather, which is cooked through a chrome retanning, receives one Printing a paste of the following composition: 2, o parts of a yellow dye, consisting of the chlorohydrate of symm. Dimethyldiaminodiorthotolylketonimid, i, o Part of a blue dye, consisting of the oxazine of nitrosodiethylmetaphenetidine -E- diethyl aminoplienol, 2.5 parts glycerin, i2.5 parts tannin, alcohol i: i, 25, o parts of water.

These ingredients are boiled and after cooling to room temperature with 60 parts British rubber 2/1 and 15 parts zinc formaldehyde sulfoxylate compound offset.

Example e.

A chrome goat skin dyed with 1 percent of a dye composed of m-oxybenzaldelide + 2 moles of ethyibenzyl aniline (sulfurized, oxidized) is given an oxidized black print using the following approach: These three solutions are mixed together and the paste obtained is printed on.

Example3. One with 2 percent of a red dye made from chlorotoluidine sulfonic acid -k- Aniline - [- Benzoyl-2-amino-5-naphthol-7-sulfonic acid dyed chrome calfskin nubuck leather is etched white with a paste of 25 parts zinc formaldehyde sulfoxylate compound, 22 parts zinc white, 15 parts albumin solution i: i, 25 parts British gum 2 / i, 10 parts water, 1 part ammonia.

Claims (1)

PATENT CLAIM: Process for the production of color and black etching prints on leather and artificial leather, characterized in that synthetic and natural Dyes as well as mineral and artificial pigments or lacquers with the help of Etching agents such as zinc formaldehyde sulfoxylate compounds, hydrosulfite preparations, or Oxidation colors come to the imprint with a short steaming time.