Hi there.If the colours state they do not contain PPD,theyre more than likely to contain PTDs.These are still pigments,however i think regulations mean the companies can use more of the PTDs than PPDs.You can not get a permanent hair colour that doesnt contain PPD/PTDs as these are the pigments that create the colour,however their are companies out there that do use a much lower amount of them in,therefore being better for absorbtion,but still patch testing should always be carried out.x
Have you ever heard of the colourstart patch test?? Will this still work with PTD's??