Our demi-permanent hair color, works just like our semi-permanent hair dye, however it lasts for even less time compared to our semi-permanent hair color. The demi-permanent color, is ammonia free and works like a conditioner, where it is put into the hair, and then can be washed out in only a couple of washes. The semi-permanent color and demi permanent dyes act differently, because the demi-permanent are termporary hair color that sticks to the hair shaft rather than soaking into the hair cuticles. These demi-permanent hair dye's are used less for covering gray hair and more for using to change the hair color for a small amount of time. The color washes out after a certain amount of time and the customer can be left with their natural hair, without feeling any side effects.