Red Dye Removal

a costomer of mine had a 3 x5 area rug on white nylon carpet.the back of the area rug was red. i put the red dye mixture in a spray bottle and misted it on it .now this was 4 years ago.the discoloration is now completely gone.i never used heat on this either.i also had red dye on a white wool 9×11 i sprayed the red dye mixture on it and it disappeared with no heat also. in most cases i always use heat.but there was no need this was a qick fix.