What are disperse dyes and reactive dyes

Disperse dye is a kind of non-ionic dye with strong hydrophobicity but little water solubility. There is no water-soluble group in the structure, but there are many polar groups, such as - NO2, - NH2, - CN, - OG, etc.
Reactive dyes are easily soluble in water, while disperse dyes are not. Moreover, the former is often in ionic state, which means that its binding property is poor and it needs to be treated by such treatment as lake coloring.