Vat Dyes by Polaris Organics

Vat dyes are widely used in the textile industry due to their excellent color fastness and vibrant hues. These dyes are primarily employed in dyeing cellulosic fibers like cotton, which are used extensively in clothing, home textiles, and industrial fabrics. The ability of vat dyes to produce deep, rich colors with high resistance to washing, light, and chemicals makes them ideal for products that require durability, such as workwear, uniforms, and outdoor fabrics. In addition to textiles, vat dyes are also used in the production of leather goods, where their strong adherence to natural fibers ensures long-lasting color.

Application Properties

1. Compatibility:Vat dyes by Polaris Organics are suitable for dyeing cellulosic fibers like cotton, viscose, and linen. They can also be used on blends containing these fibers.
2. Solubility:These dyes are water-insoluble in their original form and require reduction to their leuco form in a basic medium for solubilization.
3. Color Fastness:Known for excellent fastness properties, vat dyes provide outstanding resistance to washing, light, and perspiration. They are ideal for applications requiring long-lasting color.
4. Reduction and Oxidation:The application process involves reducing the vat dye with a reducing agent (usually sodium hydrosulfite) in an alkaline medium to produce the soluble leuco form. After dyeing, the fabric is oxidized to revert the dye to its original insoluble form.
5. Temperature Control:The dyeing process typically requires precise temperature control, usually between 60°C to 90°C, depending on the specific dye and fabric used.
6. Application Method:Vat dyes can be applied using various methods, including:
- Pad-Steam Process: Suitable for continuous dyeing.
- Dip Dyeing: For batch processes, including jig dyeing or winch dyeing.
7. Shade Range:Polaris Organics provides a wide range of vibrant shades that can be mixed to create custom colors.
8. Environmental Impact:Vat dyes from Polaris Organics are designed with sustainability in mind, offering low toxicity and being free of harmful substances like azo compounds.

Technical Specifications

1. Chemical Composition:Each dye has a unique molecular structure, primarily composed of anthraquinone or indigoid derivatives.
2. Concentration:Available in different concentrations, allowing for flexibility in application based on required shade depth and fabric type.
3. Reduction Potential:The dyes have specific reduction potentials that need to be matched with appropriate reducing agents to achieve optimal solubility and color yield.
4. pH Requirement:The reduction process typically requires a highly alkaline environment, with pH levels ranging between 11 and 13.
5. Lightfastness:Polaris Organics’ vat dyes exhibit lightfastness ratings between 6 to 8 on the blue wool scale, indicating excellent resistance to fading under exposure to light.
6. Washing Fastness:The dyes have washing fastness ratings of 4 to 5, ensuring durability and resistance to washing.
7. Oxidation Process:Requires controlled oxidation conditions, often using agents like hydrogen peroxide or atmospheric oxygen, to ensure the dye reverts to its insoluble form evenly.
8. Storage:Vat dyes should be stored in a cool, dry place, away from direct sunlight and moisture to maintain their quality over time.