Reactive ‘H’ Brand Dyes
These are monochlorotriazine Reactive Dyes with a low reactivity
and substantively. Low Reactivity warrants, more severe conditions for fixation
with cellulose materials. These are readily soluble by pouring water at 800
to 850C useful stirring Cellulose materials by dyeing as well as
‘H' brand dyes do require either a long steaming time or a high
thermo fixation temperature (with urea) for optimum fixation. H dyes of low to
medium substantively may lead to migration problem in dyeing prior to fixation.
Low concentration of highly substantive dyes when used, tailing evident by
selecting dyes of low or medium substantively, using small padding troughs fed
to constant level at the highest speed, of the process.