Different Types of Dyestuffs in Relation to the Fiber Substrate

Different Types of Dyestuffs in Relation to the Fiber Substrate



Rana Sohel Executive Engineer Sunman Textile Mills Ltd. Chittagong Cell: +8801912-420118 Email: rsohel07tex@gmail.com
Dyestuff: The desire to color textiles is an old as spinning and weaving. Natural coloring materials have been used for thousands of years; mineral pigments such as yellow and red ochre, cinnabar;

Textile Raw Material (TRM) | Different Types of Textile Raw Material

Textile Raw Material:

Raw material is a unique substance in any production oriented textile industry. It plays a vital role in continuous production and for high quality fabric. Textile raw materials are selected as per the manufacturing policy of the company i.e. whether a composite mill or only a spinning, weaving or dyeing /finishing. Types of Textile Raw Material:
Fiber

Basic Dyes | Properties of Basic Dyes

Basic Dye:
Basic dyes are called so since they are salts of organic bases. Basic dyes are also called cationic dyes because in solution the basic dye molecule ionizes, causing its colored component to become an action of positively charged radical. Basic dyes are used for dyeing wool, silk, and acrylic and mod-acrylic fibres.




Properties of Basic Dyes
1. The outstanding characteristics of

Introduction of Direct Dyes | Classification of Direct Dye | Application of Direct Dyes | Aftertreatment of Direct Dye

Direct Dye:
Direct Dye is a class of dyestuffs that are applied directly to the substrate in a neutral or alkaline bath. They produce full shades on cotton and linen without mordanting and can also be applied to rayon, silk, and wool. Direct dyes give bright shades but exhibit poor washfastness. Various aftertreatments are used to improve the washfastness of direct dyes, and such dyes are