Direct Red 13

Application Features

Direct Red 13 alias direct red sauce, direct wine red, direct purple red, direct purple sauce. The appearance is generally brown powder. Water solubility is good, soluble in water is wine red, soluble in alcohol is magenta. Soluble in cellosolve, It is insoluble in other organic solvents. The dye is blue in concentrated sulfuric acid, and has a purple-red precipitate after dilution; it is brownish yellow in concentrated nitric acid. The aqueous solution is concentrated with hydrochloric acid and has a purple precipitate. Concentrated sodium hydroxide has an orange-brown precipitate. When the copper ion color turns yellow, the color of the iron ion is slightly darker.

Mainly used for cotton and glue dyeing and printing, also can be used for silk, polyamide, viscose/polyamide fiber blended fabric dyeing, can also be used for the paper and leather color.

Use condition:

1. Direct Red 13 used to dye cotton or viscose fiber to have dark blue red color. It has good dyeing rate, poor transferability and sensitivity to salt.

When dyeing, it is advisable to slowly heat up and add salt to control the dyeing, which can obtain uniform color. The dyeing liquid should be naturally cooled to the stage after dyeing.

80 ° C, is conducive to dye exhaustion.

2. It can also be used for the dyeing of silk and its fabrics. When dyeing, it can be added with Yuanming powder. When cotton, viscose fiber and other fibers are dyed in the same bath, the wool has the same depth as cotton and viscose, and the silk is slightly shallow. , nylon can be dyed, diacetate fiber, acrylic fiber stained, polyester does not stain.

3. It has been used for direct printing of cotton or viscose fabrics, plus urea to adjust the color paste, can also be used as the color of the discharge printing. It can be used for direct printing of silk fabrics, the method is the same as cotton fabric. After dyeing the ground color Good results can be obtained with neutral dyeing.

4. It is used for dyeing and printing of viscose fiber, cotton, silk and its fabrics, and is also used in combination with yellow, orange, purple, brown, black and other dyes. And printing is very versatile, but due to poor wet handling, the amount must be properly

Precautions

Direct Red 13 can be decomposed out of benzidine, which is a banned dye. The substitute dye is direct jujube N-GB.