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Glossary

A
Acid Dye- Applied to polyamide fibres from acidic solutions. Essentially synthetic dyes, they are used for silk, wool and nylon.

 B
 
Basic Dye- Basic dyes are generally cationic dyes. Basic dyes are the dyes that is able to react with acidic groups on fibres.


Cation- Known as the positively charged ion. Numerous chemicals applied in textile processing are referred to as cationic.

D
Direct application- A method usually used to describe a process where a solution of dye is locally applied to different areas of fabric, like squirting, painting, spraying, stamping, etc.

E
Enzyme- Enzymes are now popularly used in textile processing. These are the type of protein that perform the role of a catalyst in a biochemical reaction.

F
FBA- Fluorescent brightening agent.

G
Gel Dyeing- A continuous type of tow-dyeing method where soluble dyes are used to wet-spun fibres in the gel state (i.e. After the processes of extrusion and coagulation, but before drying and drawing).

H
Hardness- A measurement that ascertains the content of minerals that imparts specific properties.

I
Illuminating Dye- A dye that is mixed with discharge paste in printing methods also referred to as head dyes.

J
Jet Dyeing- Used in dyeing of Polyester.

K
Kilogram- An unit of mass (weight) in the system of metric. It equals approximately 2.2 pounds avoirdupois.


Lake- The pigments that are produced as a result of absorption of the dye on the substrate. Most common substrate can be alumina hydrate.

M
Metal- Complex Dye- A dye that typically has co-ordinated metal atoms in its molecule.

N
Non-ionic - A chemical that does not ionize in a solution while remaining is in intact molecular form some surfactants are non-ionic.

P
pH- A perfect measure of the concentration of hydronium that is found in a solution.

R
Reactive Dye- A dye that, under proper conditions, can react chemically with a substrate for forming a covalent dye-substrate linkage. 

S
Sodium Hydroxide- It is a strong base; also called caustic soda or lye, or just "caustic" in dyeing terms. Chemical Formula: NaOH.


Tannic Acid- A mixture of compounds derived from natural sources like oak. Tannic acid treatment, followed by a treatment of tartar emetic, has been reported to improve the wash fastness of dyed nylon or wool.

U
Ultraviolet- The light that is beyond the portion that is visible of the light spectrum at the blue end. It is the Ultraviolet light that causes fading of colors, and makes fluorescent compounds glow.

V 
Ultraviolet- The light that is beyond the portion that is visible of the light spectrum at the blue end. It is the Ultraviolet light that causes fading of colors, and makes fluorescent compounds glow.

 
Washfastness- Washfastness is used to measure resistance of a dye to washing out.


Yarn Dyeing- Yarn gets dyed before being woven into fabric.

Z
Zinc Formaldehyde Sulphoxylate- A Color Index Reducing Agent 6, used for application in discharge. 

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    Bharat Mehta

    (Manager)

    Kolorjet Chemicals Pvt Ltd.

    Malad West, Mumbai, Maharashtra, India

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