How long should you leave bleach on your roots, considering your target color?

  • Bleach should be on the roots for a maximum time of 10 minutes. If you leave it on longer, you run the risk of severely damaging the hair fiber.
  • To determine exactly how long you should leave the bleach on the roots, you should consider your color and the color you want to achieve.
  • The darker the color you have and the lighter the color you want to reach, the longer you will need to leave the bleach on. However, it will never be more than 10 minutes. I’ll give you a detailed list of the maximum times for each color later on.

 

to apply to her roots

Do you have any experience with bleaching?

 

Then, you probably know that, usually, the bleaching mixture should not be left on for more than 20 minutes when you want to bleach all the hair.

 However, roots are different. You should leave it less. 10 minutes maximum. 

Do you know why?

 

Because roots are virgin, unprocessed hair. For that reason, they lighten quickly.

Also, to know exactly how long you have to leave the bleaching mixture on your roots, you have to take two main things into account:

  • the natural color of your hair (the one you have on the roots)
  • and the color you want to achieve

 

 If you leave the bleach on any longer, your roots will be white and your hair will weaken. So, be very careful about how long you leave the bleach on and how much developer you use. 

 

In order to avoid risking the health of your hair, read on because I will tell you:

  • How long to leave the bleach on the roots according to your hair color
  • What peroxide volumes to use to bleach the roots

 

 

How long should you leave the bleach on your roots according to your hair color?

lighten to even out all hair color

As a rule, bleach is never left on the roots for more than ten minutes. However, it all depends on the color of your natural hair and the color you want to achieve.

It’s not the same to bleach blonde roots to get to a nearly white, as it is to bleach brown roots to get to that same shade.

How do you know exactly what color your roots are?

 

You must have 3 centimeters of growth to completely distinguish the color.

Do you have three centimeters of growth?

 

Then, you already know what your natural color is. So, below I describe a detailed guide about roots bleaching times according to your natural color.

 

 

  • Very dark roots and rest of the hair blonde

If your roots are black 1 and you need to reach blonde tones (8, 9), you must leave the bleaching mixture on for 10 minutes.

If your roots are dark brown 3 and you need to reach blonde tones (8, 9), you must leave the mixture on for 10 minutes.

 

 It is very important that you check the bleaching process every 3 minutes. 

If you reach the desired color before ten minutes, rinse your hair immediately.

 

  • Medium roots and rest of the hair blonde

If your roots are brown 4 and you need to reach blonde tones, you must leave the mixture on for 8 minutes.

If your roots are light brown 5 and you need to reach blonde tones, you must leave the mixture on for 8 minutes.

 

Remember to check how the bleaching process so you don’t lighten your hair more than you should.

 

  • Light roots and rest of the hair blonde

If your roots are dark blonde 6 and you must reach blonde tones (8, 9), you have to leave the mixture on for 5 to 7 minutes

If your roots are blonde 7 and you must reach blonde tones (8, 9), you have to leave the mixture on for 5 minutes.

 

  • Extra light blondes

If your roots are light blonde 8 or very light blonde 9 and you need to reach very high blonde tones (10, 11, 12) you have to leave the mixture on for 5 to 7 minutes.

 

Now, in addition to the exposure time of the bleach on the roots, it is also very important to choose carefully the peroxide volumes. That’s what I’m going to tell you next.

 

What volume developer to use to bleach roots

In most cases, bleaching is done with 30-volume developer. However, that may not be the case for roots.

If your roots are blonde, you can use 20-volume developer, which will be less aggressive to the hair fiber.

When should you use 20 or 30 volume developer to bleach your roots?

 

To make the right decision, you must know the lift potential of each developer.

  • 10-volume developer, used to lighten 1 or 1 and ½ tones.
  • 20-volume developer, for 2 to 3-tone lightening.
  • 30 volume developer for 3 to 4 tone lightening.

 

So, taking into account the color of your roots and the tones you want to lighten, you can already know what developer you need.

 

30-volume developer:

  • Black 1
  • Dark brown 3
  • Chestnut 4
  • Light brown 5
  • Dark Blonde 6

 

20-volume developer:

  • Blonde 7
  • Light blonde 8
  • Very light blonde 9

 

If your roots are an extra light blonde 10 and you want to reach a white, you should use 10-volume peroxide.

 

Conclusions

  • The darker your roots and the more you want to lighten them, the longer you have to leave the bleach on the hair and the more peroxide volumes you have to choose.
  • However, you should never exceed ten minutes and you should check the process every three minutes to avoid severe damage to the hair fiber.
  • Finally, it’s important not to wash your hair for at least 72 hours before bleaching. That will protect your scalp from the irritation caused by chemicals during the process.

 

According to the color of your roots, how long will you leave bleach on?

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