Arvind Group Researcher Interview Questions and Answers

VAT dyes have good wash fastness due to their insolubility in water and ability to form strong chemical bonds with the fabric.

• VAT dyes are insoluble in water, which helps them adhere strongly to the fabric fibers.

• They form chemical bonds with the fabric molecules, making them more resistant to washing.

• The molecular structure of VAT dyes allows them to penetrate deep into the fabric, enhancing their wash fastness.

• Exampl...read more

Vat dyes are dyed by reducing the dye to a soluble form, then oxidizing it to insoluble form inside the fabric.

• Prepare a reducing agent solution to reduce the vat dye to a soluble form.

• Immerse the fabric in the reducing agent solution and let it soak for a specific time.

• Remove the fabric and expose it to air, which oxidizes the dye and turns it insoluble inside the fabric.

• Repeat the process if deeper color is desired.

• W...read more