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How Long to Leave Bleach in Hair?

how long we leave bleach in hairs

Do you want to give your hair a lighting color but never want to visit a salon? Then don’t worry, as there is a second option of bleaching your hair at home that will give your hair a yellowish or red tone depending on the natural hair color. You can also get the light effect of platinum blonde. 

But, there is a little issue about it due to which people get afraid of using bleach on hair and hairstyling at home. The first thing that has great importance is the timing to leave hair and the concentration we use for bleaching. In this article, we have come up with complete guidance for our reader’s comfort. 

Here you will come to know how long to leave bleach in hair and how much volume of bleach will be suitable for your hair tone.

Looking pretty is everyone’s desire and right also. You can do this at home easily by taking off some things. As if you want to give your hair a pretty color and lighting effect, you can apply bleach on your hair. It is not a daunting task; you can make it easy for yourself. 

Hair Bleaching

Hair bleaching is a chemical dye technique by using bleach that is an aggressive product and helps you remove the pigments from the hair. This hack is useful for people who want to get rid of dark-coloured hair or want to dye their hair with others.

Suppose your hair color is dark brown and you want to give it the red blonde color, for this, you will need to bleach your hair and then color it with the desired color product. Bleach dissolves the melanin and helps to break down the protein (keratin) bond from the hair. 

Bleaches contain ammonium and hydrogen peroxide without the functioning of bleaching powder on the hair is not possible. So don’t look forward to the bleach without these ingredients as such products are not effective. Although bleaching helps to achieve the desired color it affects the health of hair. It changes the porosity and elasticity of the hair that means the hair becomes porous and weak and it leads to split hair and breaking off it.

How Long to Leave Bleach in Hair?

different bleach vol

Before applying bleach on your hair, keep in mind that you don’t leave the bleach on your hair for a longer duration as it will lead to damage. The maximum time duration for leaving the bleach on hair to remove the hair color is about 15 to 30 minutes. Moreover, it also depends upon the hair color, hair texture, and thickness. 

Time to Leave the Bleach on Hair

The timings to leave the bleach on hair varies with the natural color of your hair. Here is the guidance accordingly.

  • Coarse Hair

Max 30 minutes as this hair type are hard, and it is challenging to remove hair color

  • Dark Hair

30 minutes for this hair type it is better to apply bleach in several sections

  • Blonde Hair

10 to 20 minutes

  • Fine Hair

10 to 15 minutes; due to thinner hair type, the process is done faster 

 In the bleach, the developer plays a very important role in lifting the hair cuticle. It makes the hair dyeing process easier. But you can apply specific volume bleach more than the suggested time as it will damage your hair. 

How Long to Leave Bleach in Hair 20 Vol?

How Long to Leave Bleach in Hair 20 Vol?

20 vol bleach means 20 volumes of hydrogen peroxide or developer in bleach that makes it more reactive. Although it depends upon the color, texture, and pattern of hair, even then, never leave this bleach mixture for more than 30 minutes on your hair. For dark hair, you can leave this bleach for 30 minutes.

If you want to use 10 vol bleach, then leave it for a max of 40 minutes as it is a very low concentration. But never forget to keep checking about the exact result after a few minutes for healthy hair.

How Long to Leave Bleach in Hair 30 Vol?


30 vol bleach contains more developer concentration, so it is better to leave it only for 15 to 30 minutes but not more than it. For brown hair, 15 minutes is more than enough. If you want a blonde color for dark hair, then leave it for 30 minutes.

How Long to Leave Bleach in Hair 40 Vol?


If you are taking a 40 vol developer to dye your hair then it is better to do it for a maximum of 20 minutes. For black hair, it is probably not easy to break pigments in short. So try to leave the bleach on your hair for about 30 minutes and apply it in multiple sessions to make the process easy and comfortable for you. If your hair is rough and challenging, then do this process in two sessions. If your hair has a thinner cuticle, then you can apply bleach for only 10-15 minutes.

How Long to Leave Bleach in Hair 50 Vol?

white blonde hair

Using a high-volume developer doesn’t mean only to lighten the hair color, it describes how fast the chemical reaction can process. The bleach with high developer volume will do the process faster than other parts. For keeping the hair healthy, it is better to use 50 vol bleach for 30 minutes, but the time should not exceed that.

How Long to Leave Bleach in Hair Roots?

After applying bleach on all the hair, apply it on roots and shouldn’t leave it greater than 10 minutes, and for stubborn hair roots, it is good to give 20 minutes. It is a natural process that roots absorb heat emitted from the scalp, and this heat makes the bleaching process more effective and faster than that of scalp hair. That’s why roots require less time for this process. Try to bleach hair roots every 2 to 4 weeks if you want to protect them from damage. 

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