Skin reactions to hair colour and Wella Koleston Perfect Innosense

If you have experienced an unpleasant, strong itchiness after having your hair coloured, it could be because your body had a reaction to certain ingredients of hair dye. What causes reactions to hair colour? The usual suspects for this kind of reaction are PPD (paraphenylenediamine or p-phenylenediamine) and PTD (para-toluenediamine). They are commonly used in… Read More