Incredible Permanent Vs Demi Permanent Hair Color References. Web according to the haircare brand clairol professional, the major difference between semi and demi permanent hair color lies in the permanency: Instead, they wrap around the hair’s cuticle, creating a coating of color that’s gradually washed away.
Web how long it lasts: It enhances the hair’s existing shade, adds richness, and can cover gray hair to some extent. Also known as a gloss.
