The Application of Reactive Dyes to Viscose Rayon

Reactive dyes of the Procion type* offer a versatile dyeing system for producing dyeings of attractive colour and good fastness to washing. A merit of the Procion system is that, since it is based on a simple chemical reaction with the fibre, it is capable of variation in easily controlled and readily understood ways common to many chemical reactions. The rate of the fixation reaction can be made to vary from slow at room temperature and mild alkalinity to rapid at high temperature or high alkalinity, intermediate rates being achievable at will by controlling various simple factors. Choice of method of dyeing is therefore wide and will depend largely on the particular equipment readily available.