Reactive Dyes

STABLE COLORS OVER TIME
Reactive dyes are the most used in dyeing processes; they have an anionic character and form covalent bonds between the fiber and the dye, which results in high wash fastness, no migration problem, and very bright colors. Reactive dyes are subject to hydrolysis, which is the reaction of the dye with water and this must be controlled to obtain optimal dyeing. There are various types of reactive dyes and the dyeing cycles are generally long.
QUIMIGEN S.A.C. offers the national market high quality reactive dyes with which a wide variety of shades can be obtained

Exhaustion dyeing
Salt
The same amount of common salt (NaCl) or Glauber’s salt anhydrous (Na2SO4) can be used. If Glauber’s salt cryst.
(Na2SO410H2O) is used; the amount of salt must be doubled.

Alkali
Caustic soda, soda ash are used to fix the dyes> The type and amount of alkali required is states as the below table.
The final pH of Tonafix reactive dye bath:

Dyeing temperature
50°C
60°C
80°C

Final pH (30°C)
Approx. 11.0
Approx.10.5
Approx. 9.5