23-11-2011, 22:51
Why you should do a patch test:
Allergy to paraphenylenediamine
It's not the brand, it's the presence of a chemical abbreviated as PPD. I'm picky with the hair colours I use for that reason.
Allergy to paraphenylenediamine
It's not the brand, it's the presence of a chemical abbreviated as PPD. I'm picky with the hair colours I use for that reason.