PPD stands for Paraphenylenediamine or p-Phenylenediamine. None of our CODE SHADES contain PPD, but a related ingredient N,N-Bis (2-Hydroxyethyl)-p-Phenylenediamine Sulfate.
Following colour guidelines, colourists must always perform an allergy test 48h before each colouration.
To find out which shades contain this ingredient, look at the ingredient list on the product packaging.