Vat dye | Why called vat dye | Vat dye properties | Uses of Vat dye | Classification of Vat dye | The 1N (indanthrene normal) group | The IW (indanthrene Warm) group | The IK group | Anthraquinonoid | Indigoid | Dyeing of cotton with vat dye | Vat dyeing recipe | Part 01 […]
Dyeing
Dyeing of Cotton with Vat dye | Part 01
Vat dye Vat dye is one of the oldest types of dye. It is mainly suitable for cellulosic fibre for best overall fastness properties. Because of the popularity of blue jeans, indigo is still one of the most important dye in the world in the present time. Natural indigo was extracted by fermenting Indigofera tinctoria […]
Defects of Sulfur Dyeing Part 3
Part 01 :Introduction to Sulfur Dyes | History of Sulfur Dyes | Method of manufacture of Sulfur dye | Trade Names of Sulfur Dyes | Characteristics of Sulfur Dyes | Features of Sulfur Dye | Chemical Structure of Sulfur Dye | Chemical Nature of Sulfur Dyes | Chemistry of dyeing with Sulfur Dye Part […]
Classification of Sulpher Dyes Part 2
Part 01 :Introduction to Sulfur Dyes | History of Sulfur Dyes | Method of manufacture of Sulfur dye | Trade Names of Sulfur Dyes | Characteristics of Sulfur Dyes | Features of Sulfur Dye | Chemical Structure of Sulfur Dye | Chemical Nature of Sulfur Dyes | Chemistry of dyeing with Sulfur Dye Part […]
Introduction to Sulfur Dyes Part 1
Introduction to Sulfur Dyes Sulfur dyes are complex heterocyclic molecules or mixtures formed by melting or boiling organic compounds containing amino or nitro groups with Na-polysulphide and Sulfur. Sulfur dyes are so called as they all contain Sulfur linkage within their molecules. Sulfur dyes are highly coloured, water insoluble compounds and have to be […]
Dyeing Jute yarn with Basic dye
Name of the Experiment: – Dyeing Jute yarn with Basic dye. Introduction: It is suitable for acrylic fibers (other fibers by mordanting). It reacts with acetic groups, or mordants a chemical which can react or complex with a chromophore to form an insoluble color in the fibre. It has good fastness properties on acrylic […]
Auxilaries Of Disperse Dye
Part 1 : Disperse Dye for Polyester | Why called disperse dye | Application and mechanism Part 2 : Method of polyester dyeing | Polyester Dyeing process Auxilaries Of Disperse Dye . Carrier : The extreme crystalline nature of polyester fibre creates problem in obtaining dark shade by conventional dyeing method even at high temperature. The carrier […]
Disperse Dye for Polyester | Why called disperse dye | Application and mechanism of disperse dyes | Features of of disperse dyes
Part 1 : Disperse Dye for Polyester | Why called disperse dye | Application and mechanism Part 3 : Auxilaries Of Disperse Dye Why called disperse dye Disperse dye are the smallest dye of all dyes. They are insoluble in water. When they are applied to the dye bath, they form dispersion. They are free from ionized group. So they have low […]
Reactive dye || Reactive dye features || Reactive dye classification
REACTIVE DYE Reactive dye is only dye that reacts with the textile fibre & makes covalent bond with fibre.Under the suitable condition it reacts with –OH or –NH2 of the fibre & forms covalent dye substrate linkage. DYE-SO2-CH2-OSO3Na + HO-Cell ———- D-SO2-CH2-CH2-O-Cell + NaHSO3 FEATURES of REACTIVE DYE 1. Water soluble. […]
Dyestuff | Classification of Dyestuffs
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. […]