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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.
How long does demi permanent hair color last? Demi permanent hair color can last up to 6 weeks and typically fades after 20 to 28 hair shampoo washes. As a hair-coloring agent, demi permanent formulas are used to enhance natural hair color, to darken the natural hair shade and to refresh previously colored hair.