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Definition: Semi-permanent hair color is defined as color that is deposit only and typically lasts 4-6 weeks depending on the hair's porosity and condition. Semi-permanent hair color usually has low or no ammonia and is a great options for clients that are concerned with the damaging effects of peroxide. Semi-permanent color will not completely cover grey but it can be used for blending it. Shop â¾.
Answers. Best Answer: Semi-permanent dye is actually less damaging than permanent, mainly because it's ammonia free. You could also use Revlon Colorsilk hair dye. It's also ammonia free, but it's permanent.Don't let the under $5 price tag fool you into thinking it's bad. It's actually one of the better hair dyes.nswers. Best Answer: Semi-permanent dye is actually less damaging than permanent, mainly because it's ammonia free. You could also use Revlon Colorsilk hair dye. It's also ammonia free, but it's permanent.