Not quite sure what the differences are? Opening up the hair shaft and adding color. Permanent Red Hair Color Clairol Easy hair color Both options provide a healthy, gentle alternative for dyeing hair, as they are less damaging than permanent hair dye can be. Permanent vs semi permanent hair dye . Of course, there's a lot more to it than that. Semi permanent hair color, also called hair gloss, simply adds color. This is because an oxidizer (such as hydrogen peroxide) and ammonia are mixed with the coloring agent before application. Permanent hair dyes are also known as oxidation, according to cuannane phillips. There are two parts to the permanent process: Firstly, it’s less complicated to master as it doesn’t require using a lot of developer (a chemical which helps to activate permanent dye). The more porous your hair, the longer your color will last. Oxidative dye is hair color that uses an oxidizing agent (usually hydrogen peroxide developer) to make chemic...