Electrolytes are one of the most important Textile essentials. They are mainly used as dyeing and chemical auxiliaries depending upon the type of dyes; they can be used as accelerating or retarding agent. Reactive dyes are one of the most used dyes in textile industry and these dyes bond themselves with the fabric by primary bonding like covalent bond.
The electrolytes basically react with fibers chemically to get fixed on to the fabric that is why they are termed as reactive dyes. These reactive dyes are soluble in water for leveled and uniformed dyeing. When they completely become soluble in water the two forces act on it simultaneously. One of them is the dye’s affinity acting on the fabric and the other is the dye’s attraction towards water. We need the solubility of water for the attraction of water fabric for the process of finishing, dyeing & printing to be taken place at a moment. Here we need to add salt (NaCl) to make them soluble in water having being more degree of dissociation, solubility, than reactive dyes in water.
Therefore, the common ion affect dye losses the solubility and makes the aggregate by attracting other dye molecules. Once acid dyes form aggregates by bonding each other, they act like a single but a huge charged ion with more cumulative attraction. At this point the fiber dye attraction becomes more than water dye attraction. In that way salt acts like an accelerating agent in dyeing process and facilitate dyeing process.