Discharge ink is a water-based product formulated to deactivate the dyes used on natural fabrics. It essentially “pulls out” the color from a fabric, rather than use an additional white or light-colored dye on top. This process creates a lighter colored print on a darker fabric. When we need to print a color on top of fabric rather than pull it out, we add water-based pigments to the usually clear discharge ink to essentially re-dye the fabric with the color of our choice. This allows us to maintain tight registration and bright prints on dark fabric without the use of an underbase.