hese are basically mixed bi-functional reactive dyes group, which is linked to chromophore via a monochloro triazine group. This type of dyes are usually applicable for dyeing of cellulosic material at 60oC temperature.

Following are some of the features of Bi-functional Dyes:-

i>. They have excellent leveling properties.

ii>. Dye-fibre bond formed between cellulose & Vinyl Sulphone group remains stable to acid hydrolysis, which helps in the stability of goods which are dyed in the industrial acidic atmosphere.

iii>. These dyes have good fastness properties. These are applicable for cellulosic materials by dyeing & printing methods.

iv>. They have better reproducibility in dyeing; have high fixation & exhaustion efficiency.