Dyes are commonly used in various applications because of its vast properties. However, many considered it as just a colouring agent, but it is a lot more than that. To name a few popularly used dyes are Vat Dye, Plastic Dyes, Basic Dyes, and Solvent Dye.
We all are aware with the term dye. Most of us think dyes are just colouring agents, but it is lot more than that.
From this article you will come to know all about the various forms of it and there uses in various industries. Let us get started-
1. Acidic – This dye has water-soluble feature, which is why it is used for fabrics like silk, wool, nylon, and polymeric compounds such as acrylic. The dye is made by bonding the anionic part of the compound with the cationic part of the cloth fibre.
2. Basic – These are just opposite of acidic dyes. The difference lies with the mechanism of action of these dyes. These are used on polymeric acrylic fibres because the chemical compound present in basic dyes helps increase the quality of the product. It advanced features also make it optimal for use in commercial coloration of papers.
3. Vat – These are water insoluble dyes. The word water insoluble dye means, it does not contain affinity for fibres. However, still many commercial fibre manufacturer companies make use of Vat Dye by reducing the chemical compound of this dye in alkaline liquor, which results in alkali salts of the dye. The salts made by reducing the chemical compound helps in effectively dying the textile fibres. Indigo is most commonly used vat dye used for colouring denims that we regularly wear.
4. Reactive – For the formation of reactive dyes, an additional compound called a chromophore is used. The additional compound used for the formation is effective in directly interacting with the substrate and colours of the fibre. Due to the reaction of two chemical dyes, the covalent bond takes places, making it most permanent dyes and prime choice of dyers. This is why it is widely used in cotton and cellulose fibres.
Apart from aforementioned dyes, there are few other type of dyes called mordant, disperse, and azoic dyes which are used to color cotton fibres. The impact of this dye in creating a darker color effect makes it optimal choice for commercial industries.