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The Classifications of Hair Color

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ashlea kirbie

on 21 April 2010

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Transcript of The Classifications of Hair Color

Semi Permenant Demi Permanant .
Demi-permanent color is also a deposit-only color with no lightening effect. The difference between the Semi- and Demi-permanent colors is that with demi-permanent color the color molecules are smaller and therefore penetrate into the cortex of the hair, as well as being deposited on and in the cuticle. This makes demi-permanent color a better choice for covering gray hair. The color also lasts longer, but will fade because of smaller color molecules being able to come back through the cuticle with each shampoo. Semi-permanent color is designed to deposit color onto the hair only and has no lightening effect. The formula includes an activator that develops the color and helps to raise the cuticle of the hair shaft so that the color can be deposited there. Semi- permanent color doesn't penetrate into the cortex of the hair, but it will usually last from six to eight weeks, gradually washing out with each shampoo. permanent haircolors are able to deposit color, but can also be used to lighten the color of the hair, depending upon the strength of the hydrogen peroxide used as a developer. Permanent Temporary Temporary color sits on the outside of the cuticle and adds color to the surface of the hair. Temporary haircolor won't take you from a darker shade to a lighter shade, but it can add some depth and richness to lighter hair. Temporary colors rarely last beyond your next shampoo. Permanent colors are designed to penetrate the hair shaft and deposit their color directly into the cortex of the hair. The formula contains a developer to raise the cuticle and allow the color molecules to penetrate into the cortex, and also contain aniline derivatives which combine with hydrogen peroxide to produce larger tint molecules which are then trapped inside the cortex. There are four types
of hair color. The classifications of Hair Color To understand hair color first you need to understand the structure of the hair. At the top of this page is a simple diagram of the layers in a single hair. The outermost layer is the cuticle; this layer is made of flat scale-like cells to protect the inner layers. The second layer; the cortex gives the hair is strength and elasticity. This layer is made of fibers twisted together like a rope. Then there is the innermost layer; the medulla made of soft keratin. The medulla is often not present, and has no effect on the hair itself
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