Hair coloring - Wikipedia, the free encyclopedia
Hair coloring is used: •to return gray hair to its previous color; •to change hair color to a shade regarded as more fashionable or desirable; •to return hair to its original color after chemicals (e...
en.wikipedia.org/wiki/Hair_coloring
However, it contains a small amount of peroxide, which allows for a subtle, but noticeable, color enhancement. It also blends and covers gray. (Both semi- and demi-permanent colors can become permanent on permed or already-colored hair!)
science.howstuffworks.com/hair-coloring3.htm science.howstuffworks.com/hair-coloring3.htm
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Clairol Pro's Jazzing, Demi-Permanent Hair Color shades spice up colored, permed and relaxed hair with temporary or semi-permanent results. Dramatic shades add vibrant color at Clairolpro.com. ... Jazzing translucent shades spice up colored, permed and relaxed hair with temporary or semi-permanent results. ... Demi, Semi, Temporary...
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#3 )  Demi Permanent Hair Color ... When I began in the hair business, Demi Permanent Hair color did not exist ( this is my 'second' career, so it wasn't that long ago...) this new category added a whole new plethora of hair coloring ideas and options were endless.
killerstrands.blogspot.com/2009/08/hair-color-category-... killerstrands.blogspot.com/2009/08/hair-color-category-change-demi.html
Demi-permanent hair color - which some people mistakenly call semi-permanent ­lasts from 12 to 24 shampoos. It contains a small amount of peroxide - which means a small amount of hair damage - but no ammonia, making demi-permanent color a midway option between semi-permanent and permanent color.
ezinearticles.com/?Demi-permanent-Hair-Color-and-Perman... ezinearticles.com/?Demi-permanent-Hair-Color-and-Permanent-Hair-Color&id=1088763
Demi-Permanent Color. Demi-permanent products last longer (approximately 24 to 26 shampoos) and also contain no ammonia, so again, you won't be able to lighten your hair. However, a small level of peroxide allows you to create a more noticeable color change.
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Demi-permanent color is a longer lasting alternative for men and women who want the benefits of semi-permanent color like enhancing tone and blending away gray. You can also brighten your hair _ level lighter than your regular shade with demi-permanent color.
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Demi-permanent color enriches color, adds shine, and blends gray. With its lower levels of hydrogen peroxide and artificial color molecules, this service has less structural impact on your hair than permanent color, and it gradually fades over a period of four to six weeks.
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