Fast Color Salts or stabilized azoics are used in the combination with Naphthols in the textile industry, for dyeing and printing purpose. These fast color salts are stabilized with metal and are also soluble in water. As a result of this, there is no need to use Hydrochloric acid or Sodium Nitrate. Compared to fast color bases, fast color salts are convenient to use with Naphthols. These salts are safe and eco-friendly and are indispensable when it comes to the dyeing and printing of textiles. Fast Bordeaux GP Salts, Fast Orange GC Salts, Fast Scarlet GG Salt, and Fast Red B Salt, Fast Garnet GBC Salt, Fast Red 3GL Salt, Fast Red TR Salt are the examples of the Fast Color Salts.
Advantages of Using Fast Color Salts
The leading fast salts like fast blue VB salt offers some distinct advantages, some of them are listed here…
- Wide variety of fast salts readily available of a wide range of products
- Compatible with a wide array of grounders
- Available in different shades with different grounders
- Free-flowing and hence can be customized according to the need and nature of the products
- Come with high strength and are glossy, thus giving the products an eye-catching, glossy finish
Process of using fast color salts in dyeing
Using fast color salts for printing and dyeing, the process involves several stages.
Salt Development
Dissolve the required quantity of salt in cold water and make sure there is no insoluble part left, for this will give a specky or crystallized dyeing. Add some acetic acid to pH 6.5 to ensure that the shade attains the desired brilliant shade and a proper depth. Then leave the solution like that to give it sufficient time for the full shade to develop so that the maximum color value can be attained.
After Treatment
Wash the developed goods using sufficient cold water and soap, with the use of 3 GPL soap along with 2 GPL soda ash. Then remove the excess diazodised product, to attain maximum rubbing and washing speed.
Process of using fast color salts in Printing
After Treatment
The printed products are washed with the use of sufficient cold water and soap and boiled using 3 GPL soap along with 2 GPL soda ash. Now remove whatever extra diazotized product is available, for getting the maximum rubbing and washing speed. For the fast red B salt and Blue BB Salt soda, bi-carb is a better option than the acetic acid.
General Mechanism of dissolving fast salt
The dyeing process consists of a couple of stages. In the first step, the material is soaked and saturated with Naphthol solution. The second step involves the development of the material with a diasodised fast salt solution. The fast saltgets chemically combined with Naphthol that is absorbed by the fiber, for lending that insoluble dye on the fiber.
This clears the role of the fast red and blue salts in dyeing products in a safe and eco-hazard-free way.