Reactive dyes have a reactive group that reacts with fiber molecules. In this context, we will talk about the properties of reactive dyes.
Properties of Reactive Dyes areas:
- It contains a group that reacts with hydroxyl in cellulose.
- Make the covalent bond with fiber and become a part of the fiber.
- A certain amount of Dye is hydrolyzed by water during Dyeing.
- Dying is carried out in alkaline conditions (PH=11.5).
- The electrolyte is necessary for the level of dying.
- Fastener properties are good.
Striping is used to dye remove from faults in Dyeing fabric
Azo group is removed.
- Partial Striping: treating the fabric with Acetic Acid or formic acid
Acetic Acid equal to 5 to 10%
formic acid 2.5 to 10%
Temperatures 7 to 200 degrees centigrade
Time until the desired shade is obtained
- Full Stripe: treated with hydro’s at a 100-degree
Sodium hydrosulfite
Then wash off.
