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.
TRADE NAME:Direct Yellow R,Direct Yellow 2G,Curcumin S,Sun Yellow,Stilbene Yellow,Acid yellow 62,Pergasol Yellow 5R,Pergasol Yellow S
| Dyeing depth % | 2 |
| Insolubles % | 0.15 |
| Light Fastness | 3-4 |
| Washing Fatness | 2-3 |
| Rubbing fastness(dry) | 4 |
| Rubbing fastness(wet) | 2-3 |
sun exposure | soaping | flooding | perspiration | rubbing | ironing | acidandalkaliresistant | |||||||
standard depth | 1/12 depth | originalcolorchange | white fiber stained | originalcolor change | whitefiber stanined | originalcolorchange | white fiber stained | dry | wet | Sulfuric | Acetate | soda ash | |
— | — | 4~5 | 4 | 4~5 | 3 | 4~5 | 3 | 4 | 2~3 | 4~5 | 3 | 3 | 1~2 |
Direct Yellow 11 Most suitable for dyeing of viscose like cotton, flax, viscose rayon, acetate and jute, also for Ink, Leather and Paper coloration.
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.
Direct Yellow 11 has strong light brittleness.
Direct Yellow 11 has moderate washing fastness and fair light fastness. Its performance can be improved by using after-treatment agents such as cationic fixatives to enhance wash resistance and reduce bleeding.
Yes, Direct Yellow 11 is suitable for both dye bath dyeing and printing processes. It offers uniform color distribution and can be applied in continuous or batch printing methods.
Direct Yellow 11 is often blended with other direct dyes to achieve a wide range of shades, especially when creating orange or green hues on cotton fabrics.
Direct Yellow 11 should be handled with standard safety precautions for azo dyes, including protective gloves and proper ventilation. Although it dissolves easily in water, dust exposure should be minimized during handling.
