Basic dyes are generally used to produce bright and deep shades with superior light and washing fastness. Its application is similar to that of Direct dyes but requires different and more precise controls with auxiliaries and temperature. These dyes possess :
Dyeing with Naphthols ? Fast Bases are more economical even compared to Reactive Dyes. Maroon, Blue, Yellow obtained with these products are not possible with any other Dyestuff. The Fastness Property of these products is excellent.