SU65483A1 - The method of increasing the strength and color change of natural-colored cotton - Google Patents

Description

Naturally dyed cotton fiber of the first collections and varieties with a color of different color, containing not more than 40% of white color, has limited industrial use. This is due to the fact that the natural color of cotton fiber is not strong enough. In addition, until now, it was not possible to control the change in color of this color.

According to the proposed method, in order to directly use natural colored cotton for the manufacture of dyed, multicolored and melange fabrics, cotton is treated with solutions of iron salts, copper or other non-alkali metals, or a solution of diazonium salts.

Iron sulfate treatment changes the brown-brown color of natural-colored cotton (or fabric) to a deep gray color. The same treatment with green vitriol is turning it into dark green. Processing natural-colored cotton (or fabric) with a solution of diazonium salts transforms the brown color of cotton into bright reddish-red. A soap trap (cooking in a soap solution) gives a slight darkening of the natural-colored cotton or a harsh color, making the color cleaner and more pleasing in appearance. Treatment with alkali, especially in the presence of oxidizing agents (for example, hydrogen peroxide), gives a sharp deepening of the hue of one or another natural color (brownish, brownish, brown, khaki, greenish, etc.).

After such treatments, the strength of the altered (developed) color is even more enhanced, and in subsequent tests for light, it is 2-3 times more light resistant than the color of ordinary (white) cotton or fabric with sulfur dyes. Color chemistry number 65483- 2 -

Cured Curing is unchangeable and anatifically more durable than Conventional artificial paint.

The ability to efficiently use the method is directly dependent on the production of cotton fiber, which has the necessary stable shade in color and the appropriate length and fineness for the possibility of spinning.

Subject invention

Claims (2)

1. The method of increasing the strength and changing the chromaticity of natural-colored cotton of the first collections and varieties with a color of different chromaticity, containing not more than 40% white, differing in THAT, in order to use it directly for the manufacture of plain-colored, multi-colored and melange fabrics, cotton is treated with solutions salts of iron, copper or other non-alkaline metals, or a solution of diazonium salts. 2. A method according to claim 1, characterized in that the cotton is subjected to treatment with oxidizing agents or alkali in the presence of oxidizing agents.