Kolorjet Chemicals Pvt Ltd. Mumbai, Maharashtra

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Direct Dyes

Paper T Yellow - 11

Paper T Yellow - 11

Paper Yellow T Yellow - 11

Light4
Washing2-3
Perspiration4
Hypochlorite4-5
DischargeabilityP

Crysophinine Yellow - 12

Crysophinine Yellow - 12

Crysophinine Yellow - 12

Light4-5
Washing2
Perspiration5
Hypochlorite2
DischargeabilityF

Yellow 5GLL H/C Yellow - 44

Yellow 5GLL H/C Yellow - 44

Yellow 5GLL H/C Yellow - 44
Light3
Washing3
Perspiration1
Hypochlorite1
DischargeabilityG

Yellow 5GLL Yellow - 44

Yellow 5GLL Yellow - 44

Yellow 5GLL Yellow - 44

Light3
Washing3
Perspiration1
Hypochlorite1
DischargeabilityP

Yellow RL Yellow - 86

Yellow RL Yellow - 86

Yellow RL Yellow - 86

Light6
Washing4
Perspiration5
Hypochlorite5
DischargeabilityG

Orange TGLL Orange - 39

Orange TGLL Orange - 39

Orange TGLL Orange - 39

Light6-7
Washing3
Perspiration5
Hypochlorite2
DischargeabilityF

Scarlet 4BS Red - 23

Scarlet 4BS Red - 23

Scarlet 4BS Red - 23

Light3
Washing3-4
Perspiration4
Hypochlorite4
DischargeabilityF

Light Red BLN Red - 80

Light Red BLN Red - 80

Light Red BLN Red - 80

Light6
Washing3
Perspiration5
Hypochlorite5
DischargeabilityF

Orange SE 200% Orange - 26

Orange SE 200% Orange - 26

Orange SE 200% Orange - 26

Light4
Washing4
Perspiration4-5
Hypochlorite4-5
DischargeabilityF

Red 12B Red Direct Dyes

Red 12B Red Direct Dyes

We are the leading supplier of Red 12B Red Direct Dyes made from high quality material at competitive prices.


Light 1-2 Washing 3 Perspiration 3 Hypochlorite 3 Dischargeability F

Red 5B Red - 81

Red 5B Red - 81

Red 5B Red - 81

Light4-5
Washing3
Perspiration4
Hypochlorite4
DischargeabilityG

Direct Dyes

Direct Dyes

Direct dyes 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). The dyeing process with direct dyes is very simple, Direct dyeing is normally carried out in a neutral or slight alkaline dyebath, at or near boiling point, but a separate after treatment such as cationic dye fixing, to enhance wet fastness has been necessary for most direct dyeing.

Chemically they are salts of complex sulfonic acids. More than 75% of all direct dyes are unmetallised azo structures, great majority of them are disazo or polyazo types. Their ionic nature is anionic and are soluble in water. They 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.

Direct dyes are widely used on cotton, paper, leather, wool, silk and nylon. They are also used as pH indicators and as biological stains.

 

How to solve the wash fastness problem for Direct DyesWash fastness quality is poor unless treated with suitable dye fixing agent and/or fastness improving finishing agent:-
In most Direct Dyes, the wash fastness quality is poor. After every dyeing, these dyes bleed a little with every washing. This results in losing brightness and also damage other clothes which are washed in the same load. So, there is a process i.e. 'special after treatment' can be used to solve this problem. For accomplishing this process, a cationic bulking agent i.e. RETAYNE is used. This agent glues the dyes into the fibers.

 

Disadvantages of Direct Dyes

 

Major types of Direct DyesThere are two major types of Direct Dyes:
Anionic Direct Dyes
Anionic Direct Dyes are used for coloring papers, controlling tint and shade and correction of two sided paper color. The main structural features of the Anionic Direct Dyes are: the planar vary from each other, the structural single and double bonds are very much extended, and contains one or more than one sulfonate groups. These sulfonate groups make them soluble in the water.

Cationic Direct Dyes
The main structural features of cationic direct dyes are :
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One Time Regular

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Immediate After 1 month

Purpose of Requirement:

Reselling End Use Raw Material

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    Bharat Mehta

    (Manager)

    Kolorjet Chemicals Pvt Ltd.

    Malad West, Mumbai, Maharashtra, India

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