Hello Paul... Did you tryed some strong oxidant, as Cl- our H2O2? you know, sometimes, just for color remove, it can be a good idea to use some bleach products. Cya!

Published by Leonardo Zanata, Professor at Faculdades Oswaldo Cruz

Hello Paul... Did you tryed some strong oxidant, as Cl- our H2O2? you know, sometimes, just for color remove, it can be a good idea to use some bleach products. Cya!