Properties Of Basic Dyes
Several chemicals and dyes are used in the textile dyes manufacturing industry. Amongst them, basic dyes are quite common. The basic dyes are called ‘cationic dyes’ because the molecules of basic dyes ionize in the solution form. Thus, the coloring component becomes positively charged radical.
It gets attached to the fiber which is negatively charged.
The basic dyes are highly useful in coloring silk, wool, and modern acrylic fabrics. Widespread use of basic dyes keeps them in high demand.
What are the properties of basic dyes?
Basic dyes have specific characteristics that make them superior to other dyes. The brilliance and intensity of basic produce colored fabric of high-quality.
Experts say that the bright color achieved from basic dyes enhances the appearance of the fabric.
Here are some properties:
- The majority of the basic dyes are soluble in water. If glacial acetic acid is mixed in water, then the dies get dissolved further quickly.
- These dyes dissolve into alcohol and mentholated spirit also.
- The fastness of basic dyes varies from poor to moderate. However, it mostly depends on washing and drying conditions, use of bleach while washing, and method of washing.
- To improve the fastness on protein fibers; back tanning is used. When the basic dyes combine with tannic acid, they produce an insoluble compound. It has a reduced tendency to migrate.
- Basic dyestuff combines with acid dyestuff and direct dyestuff or sulfur. However, it is not possible to use them together in a single bath.
- When a basic dye is treated with some reducing agent, it returns to the original color by oxidizing agents or exposure to the air. It gets converted into less leuco compounds.
- Basic dyes can be removed by boiling it with dilute hydrochloric or acetic acid.
- Some bright colors that are ideal for woolen fabric can be achieved by using basic dyes only. However, they don’t have the natural affinity for cellulosic fibers, e.g., cotton. For cotton, the dyes need to go through the process of mandating with tannic acid. Still, basic dyes are preferred when some bright shades are required for cotton fabric. For acrylic fibers cationic dyes are ideal.
- Basic dyes are used for manufacturing typewriter ribbons, printer ribbons, inks and making dyes for leather.
Because of their superior qualities, basic dyes are popularly used in the textile and other industries. They fulfill a large chunk of the total dye requirement.
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.