Reactive Dye:
Reactive dye is a dye that can react directly with the fabric. That means that a chemical reaction happens between the dye and the molecules of the fabric, effectively making the dye a part of the fabric. Reactive dyes have good fastness properties owing to the bonding that occurs during dyeing. Reactive dyes are most commonly used in dyeing of cellulose like cotton or flax, but also wool is dyeable with reactive dyes.
Reactive dye is a dye that can react directly with the fabric. That means that a chemical reaction happens between the dye and the molecules of the fabric, effectively making the dye a part of the fabric. Reactive dyes have good fastness properties owing to the bonding that occurs during dyeing. Reactive dyes are most commonly used in dyeing of cellulose like cotton or flax, but also wool is dyeable with reactive dyes.
REACTIVE
DYE
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MECHANISM
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Covalent
Bond Formation.
Good
Affinity for the Cellulosic Fibers.
Smaller
Molecule Size.
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STRUCTURE
|
 |
SOLUBILITY
|
Easily
Soluble in Water.
Good
Affinity for Water.
Polar
Nature.
|
CHARGEABILITY
|
Negatively
Charged.
Remove
Negative Charge by Adding Salts,
i.e.
NaCl
|
SUBSTANTIVITY
|
Good
Substantivity for the Fibers.
High
Degree of Fixation Efficiency.
pH Range:
7 - 11
|
FASTNESS PROPERTIES
|
Washing : Good
Rubbing : Moderate
Lightening : Good
Chemical : Stable
Perspiration: Good
|
APPLIANCES
|
They
are Applied to Cellulosic, Proteinic
and Polyamide Fibers;
i.e.
Cotton, Wool.
|
COLOUR RANGE
|
Gamete
Range of Colors.
Brighter
Shades.
All
Colors are Achievable.
|
ENVIRONMENT BEHAVIOUR
|
Non-Environmental
Friendly.
Carcinogenic
Dye.
|
COST
|
U.S:
0.5 - 1.8 $/Kg.
Cheap.
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