Bleaches - Choosing a Bleach
Bleaching of hairs is simply refers to the lightening of hairs. The chemical solutions used for lightening of hairs is called bleaches. They contain oxidising agents, like those in neutralising lotions for perms, in alkaline solution.
Hairs can be made lighter by changing the melanin pigment in the cortex into a colorless substance. The melanin is not washed out of the hair - it is changed chemically, and the change cannot be reversed. Most hair bleaches will lighten your hair in the following stages: Black, brown, red, orange, yellow blond, light blond. Pure hydrogen peroxide tends to lighten hair in grey stages instead of yellows, but is harsher on your skin and hair.
Bleaching is not the only effect of treating hair with oxidising agents. The side effects may be seen, such as breakage of some of the strong disulphide bonds of the hair. Ultraviolet light from the sun is the most common hair-bleaching agent.
Hydrogen peroxide of peroxide blonde fame, is the most famous hair bleach. Eumelanin, can be removed more easily from the cortex by bleaches. Further bleaching removes the phenomena too. Strongly bleached hairs turn to yellowed, because keratin itself is natural pale yellow.
Bleaching of hair can be occur, by the calcium hydro chlorite or sodium dichloride that are used to disinfect swimming pools.
Bleached hair, swells more readily when it is wet, and its wet strength is reduced still further. Eventually the hair protein may become so weakened that it separates and the hair breaks.
Choosing a Bleach:
For choosing the bleach, you will need to for hair bleach and one that can be safely used on the scalp.
The ingredients for hair bleaching cream may include:- Purified Water, Ceteryl Alcohol, Sodium Lauryl Sulphate, Hydrogen Peroxide, Mineral Oil, Octyldodecanol, Organo Phosphonate, Phosphoric Acid and Phenacitin.
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