Dyestuff | Classification of Dyestuffs
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Zahirul Islam BUTEX
Founder , Admin & Author at Textile Study Center
Student of Bangladesh University of Textiles ( Dept. Apparel Engineering )
Latest posts by Zahirul Islam BUTEX (see all)
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Dyestuff:
Dyestuffs are organic and inorganic substances which consists of chromophore groups, can change the physical and chemical properties of any substance , can absorb light and reflect lights to show color. They are unsaturated complex compound.
Characteristics of dyestuff :
- It must contain chromophore group
- Chromophore group can be different types like -NO2,-NH2,-CO-,-N=O.
- It must make dilute solution when it mixed with H2O but it can also insoluble too.
- Dyestuff must penetrate into the fibre .
- It must have stability and fastness property.
Criteria for choosing a Suitable Dyestuff :
It must be –
- Cheap
- Non-toxic
- Compatible with other chemicals and dyes
- Better color fastness
- Better stability
- Substantivity
- Better brightness
- Good levelness on the materials
Exhaustion of dyestuffs to fibre :
- Moving of dyestuffs from dyebath to the surface of the fibre
- Absorption of dyestuffs into the surface of the fibre.
- Diffusion of the dyestuffs into the center of the fibre.
Classification of dyes :
- According to application
- According to Common Parent Structure.
Classification According to Application:
- Direct Dye
- Basic Dye
- Acid Dye
- Sulfur Dye
- Vat Dye
- Aniline Black
- Reactive Dye
- Azoic Dye
- Disperse Dye
- Metal Complex Dye
- Mordant Dye
Classification According to Common Parent Structure :
- Nitro ( -NO2 ) Dye
- Nitroso ( -NO- ) Dye
- Azo ( -N=N- ) Dye
- Azine Dye
- Indigoid Dye
- Sulphur Dye
- Stilbene Dye
- Xanthene Dye
- Quinoline Dye
- Oxazine Dye
- Tartiary Methane Dye
- Methine Dye
- Indamine Dye
- Anthra Quinine Dye
- Lactone Dye
- Thiazole Dye
- Acridine Dye
(2508)
Zahirul Islam BUTEX
Founder , Admin & Author at Textile Study Center
Student of Bangladesh University of Textiles ( Dept. Apparel Engineering )
Latest posts by Zahirul Islam BUTEX (see all)
- Denim Wet Process | Bleach Wash | Acid Wash - June 14, 2020
- Acid Wash / Random Wash - May 8, 2020
- Denim Wet Process | Enzyme Wash - April 15, 2020
