Reason of popularity of reactive dye. Why it is superior to vat dyes?

Popularity of reactive dye

Reactive are mostly used for dyeing cellulosic fibres. At past cellulosic fibres were dyed with direct and vat dyes, but after the introduction of reactive dyes there utility has become limited. Reactive dyes are superior to direct dye in the following aspects:

i)                Ability to procedure bright shades of wide range.

ii)              High leveling quality.

iii)            Good washing fastness.

iv)            Good light fastness.

And it is superior to vat dyes in the following aspects:

i)                Simple dyeing method therefore one stage dyeing.

ii)              Low temperature dyeing (below 100⁰C)

iii)            Lower cost, i.e. cheaper.

Again its dyeing process is fast and gives brighter shades than metallized azo dyes. For the above reasons reactive dyes are more popular.