The bleach can take up to 50 minutes to saturate into your hair, depending on your hair type. The finer your hair, the faster the bleach will settle. But if you have very thick, coarse hair, it will take longer for the bleach to saturate. Because all hair is different in how it interacts with chemicals, it’s hard to give an exact time. Step 4: Apply The Bleach. Start applying the mixture from the bottom sections of your hair. Slowly cover the top section of your hair as well. Once you are done applying bleach all over your hair, cover your scalp with a hair cap. Step 5: Leave The Bleach On Hair. Keep the bleach on your hair for 30 to 40 minutes. Leave color or bleach on for the proper amount of time. If you’re using dye to create highlights, keep the color on your hair for as long as the box instructions recommend. Leaving it on for more time won't get you a richer color. If you’re using bleach, keep an eye on your hair to make sure that the highlights don't get too light. Apply the deep conditioner to your hair in sections. The more hair you have, and the longer your hair is, the more product you’ll have to use. Put on a shower cap and then wait for the deep conditioner to process. This could take anywhere from 5 minutes to 30 minutes or more. The sweet spot, though, is around 15 minutes. Hair Dye Safety: What You Need to Know About Salon and Box Color. Don’t let harsh chemicals damage skin or hair. If you’re among the millions of American women (and men) who dye their hair The longer answer, as always, is that it depends. Hair lightening by natural means isn’t necessarily a bad thing, but remember that ALL bleaching is a result of literal chemical changes that can come with unwanted side effects. As with our skin, the sun’s rays are as damaging as our individual exposure and genetics lets them be. 1. Pat wet hair with a microfiber towel after showering to prevent breakage. A microfiber towel helps prevent further breakage and damage to your already-sensitive bleached hair. After you shower, gently squeeze and pat your hair with the towel to absorb excess water. 1.1 How Long Does It Take for Your Scalp to Heal From Bleaching? 2 How to Treat and Heal Scabs on Scalp From Bleach. 2.1 Cut Down on How Many Hair Care Products You Use; 2.2 Keep Your Scalp Clean; 2.3 Keep the Burn Moisturized; 2.4 Avoid Over-Manipulating Your Scalp; 2.5 Take an OTC Remedy; 2.6 Visit Your Doctor; 3 How to Protect Your Scalp .

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