PPD is short for Phenylenediamine. Learn more about what it is and what other applications it is used for e.g. Henna and make up.
Here is the information on what PPD hair dye is and how it works. This includes the science behind it and best practices for perfect application.
Thanks to chemical ingenuity and advances in technology, possible alternatives may be emerging for those who have concerns about PPD AND PTD.
Did you know there are alternatives to PPD hair dye? See the options here for different methods of hair colouring.