What are Colouring materials? | Properties | Classification

Colouring materials (Dyes/pigments) are generally coloring materials for dyeing operation. There are various types of dyes & pigments for the coloration of textiles. Properties of Dyes The four properties that dyes must possess are: Intense color In almost all cases solubility in on aqueous solution (either permanent or only during the dyeing operation) Ability to … Read more

Composition of Commercial Dyes

Dyes are available in market in different forms, such as- Fine powders, granular form, aqueous paste, liquid solution or dispersion. Commercial dye powders are not available in pure form; they usually contain various other chemicals (Admixtures) besides the principle dyestuff. These includes- – Diluents such as salts or starch  – Wetting agents – Dispersants – Impurities … Read more

Viscose Rayon Fibre: A review

Viscose Rayon Fibre is often referred to as semi-synthetic fibre. It is produced from naturally originated cellulose in the laboratory conditions. That is why it is also called regenerated cellulose fibre. The chemical reactions that are involved in the manufacture of viscose are as follows: Viscose rayon manufacturing: The cellulose is treated with a 17.5% … Read more

Textile Testing Lab

Testing  To evaluate how something works under certain established methods or test standards. Textile testing is to check its properties under certain conditions in a standard environment prescribed as per Test standards.  Types of Testing? Destructive testing: The testing which breaks the test specimen and goes as waste after testing is called destructive testing. For example, … Read more