| Item no. |
Dyes name |
C.I. No. |
| 1 |
Direct Yellow R |
Direct Yellow 11 |
| 2 |
Direct Yellow G |
Direct Yellow 12 |
| 3 |
Direct Fast Yellow 5GL |
Direct Yellow 27 |
| 4 |
Direct Orange S |
Direct Orange 26 |
| 5 |
Direct Orange 2GL |
Direct Brown 39 |
| 6 |
Direct Yellow Brown D3G |
Direct Brown 1 |
| 7 |
Direct Brown MM |
Direct Brown 2 |
| 9 |
Direct Scarlet 4BS |
Direct Red 23 |
| 10 |
Direct Red 4BE (Congo Red) |
Direct Red 28 |
| 11 |
Direct Red 12B |
Direct Red 31 |
| 15 |
Direct Fast Red F2G |
Direct Red 224 |
| 16 |
Direct Fast Rose FR |
Direct Red 227 |
| 17 |
Direct Green BE |
Direct Green 1 |
| 18 |
Direct Green NB |
Direct Green 6 |
| 19 |
Direct Blue 2B |
Direct Blue 6 |
| 20 |
Direct Sky Blue 5B |
Direct Blue 15 |
| 22 |
Direct Fast Blue B2RL |
Direct Blue 71 |
| 23 |
Direct Grey D |
Direct Blue 17 |
| 24 |
Direct Fast Turquoise GL |
Direct Blue 86 |
| 25 |
Direct Fast Blue FFRL |
Direct Blue 108 |
| 26 |
Direct Copper Blue 2R |
Direct Blue 151 |
| 27 |
Direct Fast Blue FBL |
Direct Blue 199 |
| 28 |
Direct Fast Blue 4BL |
Direct Blue 200 |
| 29 |
Direct Blend Navy Blue D-R |
Direct Blue 297 |
| 31 |
Direct Fast Black G |
Direct Black 19 |
| 32 |
Direct Fast Black VSF |
Direct Black 22 |
| 33 |
Direct Black EX |
Direct Black 38 |
| 35 |
Direct Black HEF |
Direct Black 168 |
| 36 |
Direct Fast Yellow 5GL |
Direct Yellow 27 |
| 37 |
Direct Fast Yellow RS |
Direct Yellow 50 |
| 38 |
Direct Fast Yellow D-RL |
Direct Yellow 86 |
| 39 |
Direct Fast Yellow TGFF |
Direct Yellow 96 |
| 41 |
Direct Fast Yellow PG |
Direct Yellow 142 |
| 42 |
Direct Fast Violet BK |
Direct Violet 9 |
| 43 |
Direct Violet R |
Direct Violet 12 |
Emperor Direct Dyes:
Emperor Direct Dyes are molecules that insist to the fabric molecules without help from other chemicals. They are defined as anionic dyes with substantivity for cellulosic fibres, normally applied from an aqueous dyebath containing an electrolyte, either sodium chloride (NaCl) or sodium sulfate (Na2SO4).
Emperor Direct Dye is a class of dyestuffs that are applied directly to the substrate in a neutral or alkaline bath. They produce full shades on cotton and linen without mordanting and can also be applied to rayon, silk, and wool. They give bright shades but exhibit poor wash fastness. Various after treatments are used to improve the wash fastness of direct dyes, and such dyes are referred to as "after treated direct colors."
Emperor Direct Dyes have an affinity for a wide variety of fibers such as cotton ,viscose, silk jute ,linen etc.. They do not make any permanent chemical bond with the cellulosic fibers but are attached to it via very week hydrogen bonding as well as vander waals forces. Their flat shape and their length enable them to lie along-side cellulose fibers and maximize the Van-der-Waals, dipole and hydrogen bonds.
Application of Direct Dyes:
An addition of alkali, usually sodium carbonate, may be made with acid-sensitive direct dyes and with hard water as well as to enhance the dye solubilisation. When cellulose is immersed in a solution of a direct dye it absorbs dye from the solution until equilibrium is attained, and at this stage most of the dye is taken up by the fibre. The rate of absorption and equilibrium exhaustion vary from dye to dye. The substantivity of the dye for cellulose is the proportion of the dye absorbed by the fibre compared with that remaining in the dyebath.
Emperor Direct Dyes are used on cotton, paper, leather, wool, silk and nylon. They are also used as pH indicators and as biological stains.
Emperor Direct dyes are usually applied with the addition of electrolyte at or near the boil in the machines capable of running at atmospheric pressure.
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