How Long Can You Safely Leave Bleach In Your Hair in How To

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How Long Can You Safely Leave Bleach In Your Hair. Doing so more often will damage your hair, while waiting too long will leave you with more than just roots and be as difficult to lighten as your whole head was the first time you bleached. Then, divide the hair into four sections and apply the bleach with the 30 volume two inches away from the scalp.

How long should you leave bleach in your hair? Up On Beauty
How long should you leave bleach in your hair? Up On Beauty from uponbeauty.com

On the contrary, leaving it too long between touch ups can lead to creating an uneven colour. Bleach will start working the moment you apply it to your hair, and won’t stop until you wash it off. After applying, the bleach will be left on your hair for (typically) somewhere between 15 and 30 minutes.

How long should you leave bleach in your hair? Up On Beauty

If you bleach your roots too often, you run the risk of damaging the hair. Any longer than that and you run the risk of serious damage, including brittle strands. In order to create enough oxygen for oxidation to occur and effectively lighten the hair, activated bleach must have a high ph, which, as cincotta points out, is in the 9.5 to 11.5 range. This means you’ll definitely want to wait until your new hair has completely grown out before you bleach again, generally at least 8 to 10.