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"Bleaching" your hair (rather lightening it, since hair "bleach" is actually an ammonia based compound as apposed to household bleach which is sodium hypochlorite...) is opening the outermost layer of the hair, called the cuticle and lifting (or lightening) its color, or melanin that is found in the cortex of the hair. Depending on the melanin and/or artificial color in one's hair, the lightener will eventually turn the hair to a pale yellow. Persistent hair lightening will damage the cuticle and lead to split ends and hair breakage, so it is advised to go to a licensed cosmetologist if someone is interested in lightening his/her hair.

Applying hair bleach, also known as hair lightener (but not to be confused with household bleach) to the hair will lighten the existing color. Contrary to permanent hair color, the volume of the developer does not equate to the levels of lift, therefor, using a lower volume of developer will get the hair to the desired level of lightness with less damage.

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8y ago
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Q: What does bleaching your hair do?
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