A reactive dye was applied to woven cotton fabric then washed-off
using water and three alkaline agents (ammonium hydroxide,
sodium bicarbonate, sodium hydroxide). The aim of washing-off is
to eliminate of dyes no fixed on fabric to avoid its diss
olution
during washing what reduces fastness to washing.
The duration and temperature of wash-off were fixed, and the
concentrations of alkaline agents used were varied, and the effects
of these variables on the wash fastness of the dyeing were
determined.
There was little difference between the three alkaline agents, in
terms of the level of wash-fastness achieved. The best result was
with sodium bicarbonate and sodium hydroxide
In this study we used ultrasonic technology as a means of
enhancing dyeing process efficiency of polyester fibers with
disperse dyes, which had frequency 42kHz and, we studied the
behavior of dye when the polyester dyed with (US) and with
traditional dyeing methods (without US).
The search is focused on application of the catalase enzyme in the
dyeing bath at different temperatures and concentration to catalyze
the peroxide remaining after bleaching the fabrics of cotton and
study its effect on exhaustion and fastness of reactive dye and
compare these results with sample is dyed in clean water path
without the presence of the enzyme.
In this study, samples of cotton fabric were dyed using direct dye
by the traditional method as well as using microwave energy at
different energy levels. It was noted that the use of microwave
energy increase the dye exhaustion at the used energy
levels
compared to the traditional method, as well as improving the
fastness to washing and wet rubbing.
