We did experiment on bleaches (vs) Purex 100L (Solvent Technology Detergent Powder) The experimental data obtained in this work proved that there are a certain limit for whiteness index for cotton fabric for different whitening process like bleaching, bluing and optical brightening. It is also found that Purex 100L is the best way for getting full white cotton fabric. The results of whiteness varied with the variation of the amount of Purex 100L time,Temperature. Whiteness index also depends on the surface characteristics of the substrate. Bleaching of cotton fabric prior application of Purex 100L helps to get the optimum results of whiteness index. For Purex 100L, the optimum results were found for 4% o.w.f., 80°C temperature and 30 mins. You can use on: White & Colour Fabrics https://youtu.be/2J2xM_S9oE4 ( Watch Video ) Regards Nagaraju.M Mylab Biotech Chemicals Managing Partner 9292561829 ceomylabbiotech@gmail.com