Abstract: Abstract Salt-free dyeing of silk with ME series reactive dyestuffs in a micro-suspension dyeing system(MSD) was investigated. The comparison of the micro-suspension dyeing with the traditional dyeing was made. The results indicate that the rubbing damage of fabric surface caused by the inorganic salts was alleviated and the dyes utilization was increased in the micro-suspension dyeing. The brightness of samples dyed in the micro-suspension process was superior to those obtained in the traditional. Each fastness of samples dyed in the micro-suspension process including fastness to rubbing and color fastness to washing stand as those obtained in the traditional.

Key words: ME reactive dyestuffs, substantivity, salt-free dyeing, silk fabric