Background: Finding alternative hair dyes for individuals ... 28 patients allergic to PPD who were also tested with a hair dye series. From January 2004 through October 2006, seven additional ...

These PTDS-based products represent the first cosmetically elegant alternative hair-dye products for individuals allergic to PPD. Although approximately 43% of the patients in this study will not ...

Obviously not hair professionals, the process brings a lot of questions from what's the best way to dye our hair ourselves?