How to bleach roots without overlapping with already bleached hair

  • If you want to bleach your roots without staining the rest of the hair, you’ll need to separate the hair into six sections. That way, you can distribute the bleaching mixture evenly. Also, you should separate each section of the bleached roots with a piece of cotton to avoid overlapping.
  • You should select the developer strength taking into account the color of your roots. Also, check that the exposure time is never more than twenty minutes.


bleaching roots without overlapping


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If you have a light blonde shade and your roots are growing out, you’ll need to bleach them to match the rest of your hair.

It could be tricky if you don’t want to touch the rest of your hair.



 You have to be very careful if you don’t have coloring experience. If you put a little bleach on the rest of your previously bleached or colored hair, it can ruin your whole look. 


Also, as the roots are the newest hair, they’re the most fragile. You should be careful not to burn them.

Therefore, you need to use the correct developer strength and check that the exposure time is never more than 20 minutes.


If the bleach acts for more than 20 minutes, it could turn the roots too light or even white.


My first tip to avoid staining the rest of your hair when you bleach your roots?


 Ask a friend or your sister for help.  Then, continue with the tips below.


You should use a 20-volume developer to bleach your roots without staining the rest of your hair


The first thing to keep in mind to bleach your roots is to carefully choose the developer strength.

Why is this important?


 The higher the number of the developer, the stronger the chemical reaction in the hair. And if your hair is light, you need a weak developer.

Also, don’t forget that your hair has already gone through bleaching. It dries out the hair and could weaken it.




  • If your hair is naturally light, use a 20-volume developer. Your roots won’t need as much strength to lighten.
  • If your hair is naturally dark, you’ll need a 30-volume developer for the bleach to work.

Did you choose the developer?


Very good. The exposure time of the bleaching mixture on your roots is also important.

  • If your hair is naturally light, 5 to 15 minutes will be enough.
  • If your hair is naturally dark, you should leave it on for a maximum of 20 minutes. Also, check color every five minutes. 


So far, we have seen the easy part. Now, the tricky part begins. Fortunately, you have your friend to help you through the process.


How to apply the bleach at the roots without overlapping it with the rest of the hair

20 volume developer and bleaching powder


In this part of the process, you have to check how you separate the sections of the roots to be bleached. The aim is to avoid staining the rest of the hair.

So, no distractions with your friend. Save the Instagram posts and funny photos for another time.

Are you ready?

Let’s get to it!



  • Lightening powder
  • 30 or 20-volume developer
  • Plastic container
  • Hair dye brush
  • Gloves
  • Hair tweezers
  • Cotton



Step by step:

1- Hair preparation

Comb and separate your hair into 6 sections, holding them with hair clips.

Remember that you shouldn’t wash your hair for 48 hours before bleaching it so that it has the natural protection of the oil of your scalp.


2- Preparation of the bleaching mixture

In a plastic container, place the lightening powder and the 30 or 20-volume developer. Mix until the ingredients are completely integrated.

You can add a few drops of natural coconut oil so that your hair doesn’t suffer so much damage.



3- Prepare the separators to prevent the bleached roots from overlapping

Take a piece of cotton and roll it up. Prepare 6 strips of cotton to use on each of the six sections you separated.


4- Apply the bleach to the roots

  • Release one of the back sections. This is where your friend will have to help you.
  • With gloves on, apply the mixture to the roots. When you finish, place one of the cotton strips on the scalp.
  • Once it is firm, you should release the next section. Apply the bleach and place the hair on the cotton strip.
  • Repeat on each section until all the roots are covered.


If you follow these directions gradually, the roots won’t overlap with parts of the hair that are colored or already bleached.

Depending on the shade of your roots, you should leave the mixture on for 5 to 20 minutes. Check regularly how the bleaching is progressing.



5- Rinse off the bleach

After the exposure time, remove each cotton pad and rinse your hair with plenty of cold water to slow down the heat reaction.

You can use your regular shampoo to remove all bleach traces.


 I recommend that you apply conditioner and leave it on for about 5 minutes  so that your hair absorbs all the nutrients.



What to do after bleaching your roots

after bleaching

  • If the bleach reached the shade you were hoping for, you can now apply the hair dye.
  • If it still hasn’t reached the shade you were looking for, you should wait at least three weeks. In the meantime, moisturize your hair.


Don’t bleach your roots several times the same day, not even the next day. Bleached hair is fragile, and you can damage it irreparably.



To bleach your roots and avoid staining the rest of your hair, you should seek help from a friend or family member.

The hair at the back is difficult to handle. If the bleached roots overlap with the rest of the hair, you can end up with stains or ruin your color.


You should also choose your developer with the color of your roots in mind. Also, carefully control your exposure times.

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