Direct Yellow 11

Colour Fastness Test

Direct Yellow 11 (Direct yellow R) also known as direct straw yellow and direct yellow 2G, has a uniform brown powder, which is red and yellow when dissolved in water, slightly soluble in fibrinin and insoluble in other organic solvents.In the case of concentrated hydrochloric acid in aqueous solution, concentrated hydrochloric acid was olive yellow, concentrated sodium hydroxide was gold orange precipitation, copper ion light was green, iron ion light was slightly dark yellow, zinc and ammonium ion light yellow.

Most suitable for dyeing of viscose like cotton, flax, viscose rayon, acetate and jute, also for Ink, Leather and Paper coloration.

Use condition:

1.Direct Yellow 11 for dyeing cotton or viscose fabric have to red light yellow. The poor levelness and dye migration and dyeing times add salt to control the dyeing time points, to get a uniform color. After dyeing the dye bath should be natural cooling to 60 ~ 80 ℃, to facilitate the dye absorption. After dyeing by fixing agent can improve the fastness to wet processing.

2.It can also be used for dyeing silk and wool. When dyeing blended fabrics, the color of silk and wool should be compared Cotton and viscose fibers are much lighter, acrylic slightly stained, nylon, vinegar fiber, polyester color.

3.It is generally not used for cotton and viscose fabrics printing, not to mention ground color discharge printing.

4.It is mostly used for the dyeing of viscose silk and silk interwoven material, and the dyeing with soap soda bath can make the silk stay white.

Precautions

Direct Yellow 11 has strong light brittleness.