ROCK SALT AS A DYE ENHANCER FOR TEXTILE
Reactive dyes square is measured very fashionable for clothes as they're environmentally safe and having sensible overall fastness properties. However application of those dyes needs an awfully high concentration of Rock Salt. The Rock Salt discharged from garment coloring is increased salinity in drain water stream that incorporates a negative impact on environmental ecology. The current work aims to eliminate the usage of Rock Salt throughout coloring of cotton merchandise with reactive dyes.
The method of the concentration of Rock Salt in cotton coloring was supported the principle of cationisation (to develop a positive charge) of cotton. The treated cotton once bleached from slightly acidic tub generates positive sites attributable to protonation within the amino. The reactive dyes being anionic (negatively charged) in resolution get interested in the positive charges on the fiber that eliminates the Rock Salt needs for satisfactory dye exhaustion. After finished our work we found that Rock Salt concentration for reactive dyes on textile materials is more important to show the good colorfastness, wash fastness, rubbing fastness.
In the textile industry, industrial Rock Salt is used in the manufacture and processing of fabrics and materials, such as for dyeing cotton. When used in a dye bath, salt causes the dye to completely penetrate the fabric, thereby making the dyeing process easier.
WHY IS ROCK SALT USED
IN TEXTILES?
Is an interesting and basic question in the area of textile processing, particularly in dyeing? The textile substrate and dye molecule, not necessarily should have of homogeneous characteristics to combine with each other. In such case, we require some catalyst to facilitate dyeing action on fabric. Rock Salt plays this crucial role of catalyst. Rock Salt has an extremely high affinity for water. Broadly speaking, Rock Salt is necessary in three ways, firstly, to drive dye into textile during the dyeing process in textile. Secondly, use of Rock Salt leads to maximum exhaustion of dye molecules during dyeing process in textiles. Thirdly it is used as an electrolyte for migration, adsorption and fixation of the dyestuff to the cellulose material.
Rock Salt play important role in reactive dyeing by improving the affinity of the dyestuff towards the fibre and acceleration of the dyestuff's association and lowering its solubility.
FUNCTION OF SALT IN THE DYEING PROCESS:
The Rock Salt in the reactive dyeing increases the affinity of the dye towards the Cellulosic substrate…
Rock Salt increases the exhaustion rate of reactive dyestuff's…
As reactive dyestuff's have a lower affinity, more inorganic Rock Salt is required when using reactive dyestuff's in order to accelerate absorption…
While the amount of inorganic salt used varies according to the type of dyestuff used, recently developed high-fixation dyestuff's with improved affinity allow the amount of inorganic Rock Salt to be reduced.
Rock Salt is used to improve textile fibres, especially when dyeing and printing cellulose based fabrics. Rock Salt encourages the dye to penetrate the material and bind to the fi bres. The purer and more high-quality the salt used is, the better the dye results are.