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With the help of our team of experienced professionals, we have become top organization and engaged in exporting an extensive quality Vat Dyes. This product is processed at our well-established production unit under the favorable conditions using superior quality compound. In order to ensure quality, the product is stringently tested on defined parameters before its final supply. Our valued clients can use these Vat Dyes in various industries such as textile, plastic and rubber.
What is Vat Dye?
Vat Dyes are quite different from conventional reactive dyes, basic dyes, azoic color and some others. It has similarities with sulfur dyes in terms of applications. Vat dyes are a class of colors that are delegated such on account of the strategy by which they are connected. Vat coloring is a procedure that alludes to coloring that happens in a pail or vat. Any color, including fiber-receptive colors, direct colors, and corrosive colors, can be utilized as a part of a vat color. Cotton, fleece, and different strands can be all colored with vat colors. The first vat color is indigo, once got from plants however now created artificially.
Vat Dyeing Process
Vat dyes distinctively require a lessening specialists to solubilize them. The most widely recognized lessening operators is sodium dithionite (Na2S2O4), which changes over the color to its "leuco" structure that is dissolvable. When appended to the fabric, the leuco color is then oxidized to the insoluble state which is seriously shaded. Synthetic responses, for example, oxidation, decrease, pH control are frequently fundamental; even the disintegration process requires allotting proper amounts of caustic soda and sodium hydrosulphite keeping in mind the end goal to accomplish diminishment. The dye is dissolvable just in its diminished (without oxygen) structure. The fiber is inundated over and over in this sans oxygen dyebath, then presented to the air, whereupon the water-dissolvable lessened structure changes shading as oxygen swings it to the water-insoluble structure. Hence, vat colors are less suitable than fiber-receptive colors for novice use.
Indigo is an illustration of this color class: it changes from yellow, in the dyebath, to green and afterward blue as the air hits it.
Properties of Vat Dyes
The dyes have excellent colorfastness.
After special treatments to the fabric, vat dyes get a good rubbing fastness
Since indigo is vulnerable to crocking, it should be applied carefully.
The vat dyes require weaker dyebath and dipping multiple times.
Applications of Vat Dyes
Vatting in which commercial dyes are treated with sodium hydrosulphite and sodium hydroxide to reduce
Oxidation of leuco vat dye is absorbed being absorbed by the fabric
After treatment, soaping