As the saying goes ‘Colors, like features, follow the changes of the emotions’ hair coloring has been one the fastest trends of beautifying one’s own hair with a shade of their chose which intern reveals their character.
Hair coloring has been serious business for a very long time. For example the heroes of the Greece used bleaches and harsh soaps to redden their hair which is the color that signifies honor and courage. Hair colors still remain hot, with an average of 75% percent women reportedly coloring their hair. Women are keen in changing the color of their hair they try color tints, highlighting, both permanent and semi-permanent and temporary hair color. Also men all the time more cover gray or completely change their look following women.
The selection of coloring products and techniques is mind-boggling. Most hair colors can be applied easily: to wet hair, to dry hair, or worked into shampoo lather. Hair coloring products generally fall into four categories they are temporary, semipermanent, deposit only/demi, and permanent. Except temporary color all the other hair color products suggest a patch test before application to determine if the product is allergic to the client.
In temporary color the pigment molecules are large therefore they do not penetrate the cuticle layer, thus only allowing a coating action that may be removed by shampooing. To coat the surface of hair acid dyes are used. These dyes have a low affinity to hair, thus can be removed after shampooing. Temporary colors are available in various product forms like rinses, shampoos, gels, sprays, and others. This hair color is used to give a brighter, more vibrant shade or colors that may be difficult to achieve with semi-permanent and permanent hair color. This is because these dyes remain adsorbed (closely adherent) to the follicle and can be easily removed with a single shampooing as they do not penetrate the hair shaft itself.
This semi permanent color adds color to the hair without changing natural color radically. The phenomenon is that the hair color contains tiny color molecules that enter the hair’s cuticle and go into the hair’s cortex without interacting with the natural pigments. These molecules are small; and they eventually exit the hair shaft after several shampoos, leaving the hair as it was before treatment.
Demi permanent colors lasts longer, through 24 to 26 shampoos. The phenomenon is that the pre-color molecules penetrate the cuticle and enter the cortex where they then partner to create medium-sized color molecules. Here larger size means they take a longer time to wash out. These products contain a small amount of peroxide which permits a subtle, but noticeable color augmentation which also blends and covers gray. But they do not contain ammonia so the natural pigment can’t be lightened.
Permanent colors are used by people who require a more significant color change. These colors and lighteners contain both a developer, and oxidizing agent, and an alkalizing ingredient and also ammonia and peroxide. The tiny molecules enter into the cortex where they react and expand to a size that cannot be washed. This ends in a combination of the natural hair pigment and the new shade. Thus the color may appear different on different people.