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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.
What's the difference between permanent hair color and semi permanent hair color? Let's start with a quick definition. Permanent color is what people mean when they say hair dye or color-treated hair.. There are two parts to the permanent process: opening up the hair shaft and adding color. Semi permanent color, also called hair gloss, simply adds color.