Semi-Temporary:Color lasts up to 4-6 shampoos. Usually contain no ammonia and does not have a developer.
Demi Permanent:Color usually contains little or no ammonia and utilizes a low peroxide developer (under 10 vol.) the color lasts about 6 weeks and fades gradually back to the natural shade.
Semi-Permanent: Color usually contains some ammonia and uses a developer of 10 to 20 vol.
Permanent:Color formulas change the natural hair color. They require maintenance to new hair growth after 4 to 6 weeks. (For the purposes of this guide we will be discussing Permanent colors and methods of processing only.)
Natural Henna Hair Color: The henna plant is native to Asia and the Mediterranean coast of Africa and thrives in warmer climates all over the world. The leaves are harvested, dried, and ground into a fine powder. Henna contains hennotannic acid, a dye that bonds with the collagen in skin cells and keratin of fingernails and hair, leaving behind a coloring.
Natural Indigo Plant: Indigo's botanical name is Indigofera tinctoria found in India and other sub-tropical countries. A blue dyestuff is obtained from the various species of Indigofera readily soluble in water. It is a very well-known and highly important dye, millions of pounds being exported from India annually.
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