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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.
Meanwhile, the complete permanent hair color process can lighten hair and embeds color more deeply into hair. This is why it provides full coverage for grays and complete hair color changes, and lasts much longer than semi permanent hair color.