How Long To Leave Bleach In Hair 20 Vol Dark Hair in How To

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How Long To Leave Bleach In Hair 20 Vol Dark Hair. The maximum amount of time you should leave bleach on your hair is 30 minutes. For example, if you have black hair and you want to go full.

Before and after toning my own hair with wella toner T18
Before and after toning my own hair with wella toner T18 from www.pinterest.ca

Both bleach and developer are harsh chemicals. The first round of bleach will be with 25 vol developer and toner with 20 vol developer, the second with lightener with 20 vol developer and toner with 20 vol developer. The longer you leave the bleach on your hair, the more keratin bonds get destroyed and the lighter your hair gets.

Before and after toning my own hair with wella toner T18

It’s relatively safe and could stay in longer. A bleach and developer mixture can be left in your hair anywhere from fifteen to thirty minutes, but no longer. For 20 vol bleach, you are advised to leave the bleach in the hair for about 20 to 30 minutes. Leaving bleach on your strands for more than the recommended time can lead to damaged hair.