How Long Do You Leave Bleach On Your Hair

Aiming for a lighter shade of hair, but not keen on the idea of a trip to the salon?

Your hair might be tempted to be bleached, which is the process of stripping a hair of its color in order to achieve a lighter shade.

Even though hairstylists don't recommend it, you can do it yourself.

Here, you'll learn how to bleach your hair at home, including how long to leave it on and how to avoid permanent damage.

In order to help you determine how long to leave bleach in your hair depending on your desired outcome, we've put together this guide. It's our hope that this information will be useful to you!

How Long Do You Leave Bleach On Your Hair

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As a result of a common misconception, bleach is thought to be more effective the longer you leave it on. Wrong!

30 minutes is the maximum amount of time you should leave bleach in your hair. This is to prevent long-term damage to your hair.

Some people believe that if you leave bleach on your hair for a few hours, it will last longer, but this isn't the case at all. If you do this, you'll end up with hair that's brittle and orange!

A maximum of 30 minutes should be allotted for bleaching; anything more than that could lead to the destruction of the hair we've worked so hard (and paid for) to achieve!

How Does Bleach Dye Hair?

Because of its reputation as a "aggressive" product, bleach is so named.

It works by dissolving the color and opening the hair cuticle (melanin). The protein bonds (keratin) break down faster and faster the longer you leave it on.

Bleaches made from ammonia and hydrogen peroxide are the most commonly used types of bleaches today. Due to the lack of alternatives, it is difficult to avoid damage.

Certified hairstylist and makeup artist Nikki Goddard, for example, advises customers to steer clear of products labeled "peroxyde-free."

A new oxidizing agent was used, which could have been even more damaging to the hair.

What Happens If You Leave Bleach On Too Long?

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The fun of bleaching your hair can be tempered by the dangers of doing so without proper care. In the worst-case scenario, you could end up with hair that isn't the color you wanted or worse, damage your hair.

Allowing your hair to sit in the bleach for too long, which can cause it to dry out and break more easily, is one way to avoid this (which makes the colour uneven).

What Kind Of Bleach Should I Use?

Bleaching agents can be divided into four categories:

Peroxide –  Hydrogen peroxide with a concentration of 10% or more is the strongest option. Using hydrogen peroxide on a regular basis will gradually lighten the color of your hair without causing any harm. Use it to lighten dark hair to a blonder shade.

Hydrogen Peroxide Solution – It's not quite as potent as the more concentrated hydrogen peroxide, but it's still a viable option. Despite this, it's a great product that won't harm your hair and still gets the job done. A stronger solution is required to work with their clients' extremely dark hair, which is why professionals prefer to use peroxides over home users.

Bleach Powder Mix – When mixed with 10 percent hydrogen peroxide or ammonium bromate, bleach powder can be used to easily apply to hair and distribute evenly throughout strands of hair. One of the cheapest ways to bleach your hair at home is to mix powder bleach with water.

Liquid / Creme Developer –The developer cream must be mixed with either peroxide or this solution before it can be applied to your hair. If you already have light blonde hair but want to lighten it further, you can use creme developer on its own. However, this will not work on dark hair because it does not contain enough hydrogen peroxide for the job, so be sure to check your natural hair color before considering this route. "

Each of these types has a different concentration, which means that some are stronger and take longer to achieve your desired shade.

The Difference Between Hair Volume Developer Strengths 

First, we'll cover the basics to help you understand the differences between hair developer levels. This chemical, when combined with hair color or bleach, allows the hair cuticle to open up.

On the developer packaging, the number indicates that it contains hydrogen peroxide (10, 20, 30, or 40). A look at some of the developer's strengths is in order below.

  • If you want to darken your hair just a tad, a 10 volume developer is ideal. Developer in 10 volume only adds a tint or shade to the same lightness level as your base color due to its low peroxide content (3%). You can easily go from one lighter to another darker shade or maintain the same hair color.

  • The 20 volume developer is used primarily for permanent dye or temporary color. It opens the hair cuticle and lightens the hair by one to two shades, thanks to its peroxide content (6%), which is ideal for completely covering gray or white hair with a beautiful, long-lasting color.

  • The higher peroxide level in the 30 volume developer makes it lighter than the 20 volume developer by two or three shades (9 percent ). If you want to lighten your hair just two or three shades, this is a good option for you. It's best to use the '30 volume developer' if you want light brown to honey blonde curls if your hair is dark.

  • The most potent developer, 40 volume, can have a significant impact on the color of your hair. 40 volume developer has a peroxide concentration of 12 percent and can lighten hair by up to four shades.

How Long Do I Leave Bleach In Brown Or Black Hair?

When it comes to bleaching dark hair colors like black and brown, it's extremely difficult.

It's possible that you'll need to increase the strength of the bleach or lighten your hair multiple times to get the desired results.

You can use as much bleach as you like for the longest time possible. So 30 minutes is the maximum. However, keep in mind that you may need to perform a few bleaching procedures.

Do a strand test before each application so you'll know exactly what to expect and what shade your hair will lift to.

How Long Should You Leave Bleach On Your Roots?

Is there ever a time when you wonder how long bleach should be left on your hair?

If your hair is dark or light, and if it has been dyed before, the amount of time the bleach needs to remain on your hair will vary.

It's not necessary to use as much bleach on naturally light hair or virgin hair (which has never been dyed), so you could get away with 5-10 minutes of bleaching instead.

The opposite is true for those of us with darker hair. Remember that our hair's roots are darker than the rest of it. Blonde hair with dark roots is extremely fashionable right now, as is the grown-out root look.

So you don't want to go platinum blonde or white-blonde on your roots because it's not going to look real!

Best Tips for Bleaching Hair at Home

Minimize Damage

Your hair and skin can be harmed by bleaching, which is a powerful substance. Be careful not to get bleach on your face while applying it. To keep your hands safe, put on gloves and old clothes that you won't mind getting stained.

Prepare Your Hair

Because bleaching removes so many nutrients from your hair, it can be a grueling process.

Preparing your hair with hydrating products, such as deep conditioning treatments, moisturizing shampoos, hair masks, and hot oil treatments can help minimize the damage. Even the squish-to-condish technique might be an option.

You should avoid stripping your hair of nutrients by using gentle shampoos like sulfate-free ones for a few days before bleaching it.

Before bleaching their hair, some people use hair oils like coconut oil. Coconut oil hydrates and protects the hair's proteins, reducing damage.

While bleach is a powerful product, it won't prevent damage to your hair, but it can minimize it.

Apply Bleach Correctly

No matter how many times you've bleached your hair before, you should always follow the manufacturer's instructions exactly when doing so.

To ensure an even coating of bleach, be sure to apply it thoroughly. Section your hair to ensure that each strand is covered in a layer of hairspray.

Finally, avoid touching your scalp while using bleach. The skin on your head can be damaged by bleach, so only use a small amount on the top and work your way down.


Consult with a colorist (or a hairdresser) if you have any questions or concerns about the process described here.

However, in order to preserve your hair's strands, do not leave bleach in your hair for an extended period of time. To be on the safe side, always read and follow the manufacturer's instructions before using any product.

When bleaching your hair at home, we recommend using a lower-level developer and never rushing the process.

As a result, curly-haired people are the most susceptible to breakage. So, if you want to keep your hair's natural texture and health, you'll want to lift your curls gradually.


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