How Long Do U Leave The Bleach In Your Hair in How To

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How Long Do U Leave The Bleach In Your Hair. If you want to lighten your hair a few shades lighter, we recommend you leave the bleach in for up to 30 minutes. In testing a few strands first, this will serve as a guide to the amount of time needed to achieve your preferred level of lightening.

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But here’s the general rule of thumb: For 20 vol bleach, you are advised to leave the bleach in the hair for about 20 to 30 minutes. If you observe any irritation, wash the bleach off immediately with cold water.

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Plus, your hair shouldn’t remain in bleach for longer than 45 minutes or you risk all the negative side effects of bleaching. But remember not to leave it in your hair for more than 30 minutes. Lift the shower cap and check your hair’s lifting progress. Your hair will need to be toned for anywhere between 15 and 35 minutes if it has brassy roots.