What is the difference between semi and demi permanent hair color, and glazing?

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What is the difference between semi and demi permanent hair color, and glazing?

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Glazing is very temporary and rinses out as soon as the hair gets wet. That’s why the more old-fashioned ladies sometimes wear plastic rain bonnets. “I can’t risk the lapel” they say. When it rains, the color could drip down and discolor clothing. That’s an outdated process. Today’s semi-permanent colors don’t run and drip like they did 30 years ago. Glazing can also refer to giving the hair a clear shine treatment, or a very slight tinge of color. Semi and demi permanent colors use the same development methods. The difference between semi and demi permanent color is the longevity of the color, the fade factor, and the application. Demi permanent is stronger and longer lasting, but it still fades, just not as fast. Semi-permanent is designed to fade with each shampoo until it is gone in about 3-4 weeks. Demi-permanent will usually hang on longer, 5-6 weeks, depending on the products used at home.

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