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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.
Permanent color uses a developer (usually 10, 20, or 30 volume) to change the color fo your hair. This color is, as the name suggests, permanent. It will not wash out. Some people find that their hair will not hold permanent red hair color molecules. Usually this is caused by hair damage, but it could also be natural porosity issues. Permanent hair color is supposed to be called âhair colorâ, not âhair dyeâ. I donât know when it became the standard term, but a lot of salon professionals get really upset about it, so itâs best to use the correct term. Semi-Permanent. One of the terms you hear most when referring to crazy colors is âsemi-permanentâ.