The dye is a substance used for coloring textiles, papers, leather, and other things. This color doesn’t get altered by washing, exposing to the sunlight and heat, and other factors.
It is different from the pigment which is a beautiful colored powder dispersed in a medium. The examples are paint and ink.
Pigments are inorganic or organic compounds.
A dye, on the other hand, is mostly an organic compound.
Based on the source, we can classify dyes into two categories; natural dyes and synthetic dyes. Both types have different characteristics and qualities.
They are used in different applications based on their suitability and applicability.
Dyes are soluble in water and/or organic solvents. Pigments are insoluble in both types of liquid media.
A dye can color substrates that show affinity towards the dye. A pigment can be used to color any polymetric substrate. However, the coloring mechanism is different in both cases.
What are natural dyes?
Until the end of the nineteenth century, all dyes were obtained from natural sources. The main sources were vegetables, plants, trees, and lichens.
A few dyes were extracted from insects and animals as well.
The oldest evidence of the dyeing method is found in the Egyptian tombs. People discovered beautifully died pieces of fabrics in the ancient pyramids.
There are hieroglyphs about the dye extraction process. The natural dyes aren’t highly stable, and they are complex mixtures.
Alizarin and indigo are significant dyes. Alizarin is red, and Indigo is blue in color. These two dyes are still in use. They are rated high in terms of dying properties. Though the synthetic indigo is also widely used, natural indigo is always in demand for coloring types of denim.
After 1850, chemical dyes were discovered in Great Britain. They got immense popularity in a short time. The synthetic dyes replaced natural dyes because they were produced in bulk.
It was the foundation of dyes manufacturing industry which reduced the cost of dying. Though the earlier synthetic dyes were not good in quality, they improved consistently in the later centuries.
Nowadays, we have incredibly good-quality synthetic dyes available in a wide spectrum of colors.In the nineteenth century, the studies of coal tar revealed that reactions of coal tar compound can yield various dyes.
Thus, dyes have changed the world by producing beautiful eye-catching products. The continuous advancement in technology introduces new and more attractive dyes in the market.
If you are looking for dyes and chemicals manufacturers in india then Sagar Colour Co. is one of the foremost acrylic dyes, cationic dyes and textile chemicals manufacturers in Gujarat as well as other parts of India.