however if three applications of the 3 h 2 o 2 are applied about two minutes apart significant whitening of the nail could be seen and after 15 30 minutes a slight sensation could be felt beneath the nail on a weight basis 9 hydrogen peroxide 9 water 81 5 isopropyl alcohol and 0 5 klucel hf were mixed in a vessel and allowed to thicken the source of the peroxide was a 50 peroxide solution the composition could easily be brushed onto a nail surface which dried in approximately 1 minute and the residual polymer could subsequently be removed by washing in water within a few minutes a significant whitening effect of the nail was observed on a weight basis 12 hydrogen peroxide 12 water 75 5 isopropyl alcohol and 0 5 klucel hf were mixed in a vessel and allowed to thicken the source of the peroxide was a 50 peroxide solution the composition could easily be brushed onto a nail surface which dried in approximately 1 minute and the residual polymer could subsequently be removed by washing in water within one minute a significant whitening effect of the nail was observed within 15 minutes one subject noted pain a burning sensation under the nail on a weight basis 18 5 carbamide.