| 摘要 |
<p>Process for dyeing cellulose fibres comprising successively a stage (a) of bleaching the cellulose fibres with the aid of an alkaline bath containing aqueous hydrogen peroxide, a stage (b) of neutralising residual aqueous hydrogen peroxide with an excess of reducing agent, and a stage (c) of dyeing the cellulose fibres with the aid of a reactive dye containing a reactive group which is sensitive to reducing agents, characterised in that after stage (b) and not later than the beginning of stage (c), the residual reducing agent is removed by employing a quantity of an alkali or alkaline-earth metal halite which is sufficient to neutralise it, and thus make it possible not to perform any intermediate rinsing between stages (a) and (c). Application especially to cotton dyeing.</p> |
