How To Get The Perfect Ratio of Bleach to Developer [+ Calculator].

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Are you wondering about the perfect ratio of bleach to developer?

Developer is used to lighten hair color while bleach is used to remove all pigment from the hair. When these two products are mixed together in different ratios, it can result in different levels of lightening.

If you’re looking to achieve a certain level of lightening with your hair color, it’s important to mix them together in the right ratio.

Follow these five easy rules to get the perfect blend every time.

5 easy rules to get the perfect ratio of bleach to developer.


1. Start with a 1:1 ratio of bleach to developer. This is the most common starting point for lightening hair.

2. If you want to lighten your hair more, you can increase the bleach powder to developer ratio. For example, you could use a 2:1 ratio of bleach to developer if you want to lighten your hair more quickly.

3. If you want to lighten your hair less, you can decrease the ratio of bleach. For example, you could use a 1:2 ratio of bleach to developer if you want to lighten your hair more slowly.

4. You can also adjust the ratio based on the strength of the products you’re using. If you’re using a stronger bleach, you may need to use a lower ratio of bleach. Conversely, if you’re using a weaker bleach, you may need to use a higher one.

5. Finally, remember that it’s always better to err on the side of caution when mixing bleaches and developers. If in doubt, mix the products at a lower ratio rather than a higher one. You can always add more bleaching agent if needed, but you can’t undo the damage if you use too much!

Ratio of Bleach to Developer Calculator!

Need help working out your bleach/developer amounts by ratio and exactly how much you need? Just use our bleach to developer ratio calculator!

Bleach Developer Ratio Calculator

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What is bleach and what is developer and what do they do in the hair-coloring process?

When you’re at the salon getting your hair colored, you probably don’t think too much about what’s actually going into the mix.

But if you’re curious about the science behind hair color, bleach and developer are two key ingredients.

Hair bleach is a chemical that essentially “lifts” the color out of your hair by breaking down the pigment molecules.

Hair developer is a hydrogen peroxide-based solution that helps to open your hair cuticle so that the bleach or hair dye colorant can be absorbed into your hair shaft and actually do its job.

When these two products are mixed together in different ratios, it can result in different levels of lightening. That’s why it’s important to get the ratio right if you’re trying to achieve a specific hair color.

Hair bleach before and after.

How to mix bleach and developer for the perfect ratio.

There’s no magic formula for getting the perfect ratio of bleach to developer. It depends on the color your hair is now and how light you want it to be.

But there are a few general guidelines you can follow:

1. Start with a 1:1 ratio of bleach to developer. This is the most common starting point for lightening hair.

2. If you want to lighten your hair more, or if you want to bleach dark hair, you can increase the ratio of bleach. For example, you could use a 2:1 ratio of bleach to developer if you want to lighten your hair more quickly.

3. If you want to lighten your hair less, you can decrease the ratio of bleach. For example, you could use a 1:2 ratio of bleach to developer if you want to lighten your hair more slowly. You can also apply the bleach to wet hair which will weaken the strength of the bleach.

4. You can also adjust the ratio based on the strength of the products you’re using. If you’re using a stronger bleach, you may need to use a lower ratio of bleach. Conversely, if you’re using a weaker bleach, you may need to use a higher ratio of bleach to developer.

5. Finally, remember that it’s always better to err on the side of caution when mixing bleaches and developers. If in doubt, mix the products at a lower ratio rather than a higher one. You can always add more bleaching agent if needed, but you can’t undo the damage if you use too much!

How to mix hair dye and developer step by step.

Here’s a great video that shows you how to get that perfect bleach powder and developer ratio step-by-step.

YouTube video

What’s the difference between lightening and bleaching your hair?

The terms “lightening” and “bleaching” are often used interchangeably when talking about hair color. But technically, there is a difference between the two:

Lightening refers to the process of using bleach or other chemicals to change your hair color from dark hair to light hair.

Bleaching refers to the process of using bleach or other chemicals to remove all pigment from your hair, essentially resulting in white hair.

So, if you’re trying to go from black hair to blonde hair, you would technically be lightening your hair. But if you’re trying to go from any color hair to white hair, you would be bleaching your hair.

How to achieve the perfect level of blonde using bleach and developer

If you’re hoping to achieve the perfect level of blonde, there are a few things you’ll need to keep in mind.

First, it’s important to start with a clean slate. That means making sure your hair is free of any dirt, oil, or product build-up before you start bleaching your hair at home. Otherwise, the bleach won’t be able to penetrate your hair shaft and do its job properly.

You’ll also need to choose the right products for your hair type. If you have damaged or dry hair, for example, you’ll want to use a bleach mixture that’s gentle enough not to further damage your strands.

Once you’ve got all of that squared away, it’s time to mix your bleach and developer. As we mentioned before, there’s no magic bleach powder and developer ratio that will work for everyone. But a good starting point is usually a 1:1 ratio.

Once you’ve mixed your products together, it’s time to apply the mixture to your hair. Be sure to use gloves to protect your hands, and follow the instructions on the bleach packaging carefully.

After you’ve applied the mixture to your hair, you’ll need to wait for it to work its magic. The amount of time you’ll need to leave the bleach in your hair will vary depending on how dark your hair is and how light you want it to be, but it’s usually no longer than 30-40 minutes.

Once the desired amount of time has passed, rinse the bleach out of your hair with shampoo and conditioner for bleach hair, and enjoy your new color!

What happens if you put too much developer in bleach?

If you put too much developer in your bleach, it can dilute the strength of the bleach and cause your hair to turn an unwanted shade of orange or yellow.

So, if you’re bleaching your hair, be sure to mix the bleach and developer at the correct ratio. And if you’re not sure what ratio to use, it’s always better to err on the side of caution and use a lower ratio rather than a higher one.

You can always add more developer if needed, but you can’t undo the damage if you use too much!

What are the risks associated with over-bleaching your hair, and how can you avoid them?

Over-bleaching your hair can cause a number of problems, including dryness, frizziness, brittleness, and even breakage. It can also lead to scalp irritation and allergic reactions.

To avoid these problems, it’s important to use the right products and follow the instructions carefully. It’s also a good idea to get your hair professionally done if you’re not confident in your ability to do it yourself.

And finally, be sure to give your hair some extra TLC after bleaching it to help restore moisture and protect against further damage.

A few tips for keeping your newly bleached hair looking its best.

1. Avoid washing your hair too often. Bleached hair is more susceptible to dryness and breakage, so it’s important to avoid washing it more than necessary. Try to wash your hair no more than twice a week, and use a gentle, sulfate-free shampoo when you do.

2. Use a deep conditioner or hair mask at least once a week. This will help to replenish moisture and keep your bleached hair looking healthy and feeling soft and silky.

3. Be careful when styling your hair. Avoid using hot tools too often, and be sure to use a heat protectant before styling. When possible, let your hair air dry instead of using a blow dryer.

4. Invest in some quality hair products. Bleached hair can be difficult to manage, so it’s important to use products that will help to keep it under control. Look for products that contain ingredients like keratin, amino acids or protein, which can help to smooth and strengthen your hair.

5. Get regular trims. Getting your bleached hair trimmed every 6-8 weeks will help to get rid of any damaged or split ends. This will also help keep your hair looking healthy and prevent further breakage.

6. Tone your hair with purple shampoo once a week to get rid of any brassy orange or yellow tones.

Follow these bleached hair tips and tricks – and as long as you aren’t bleaching hair too often – and you’ll keep your lock looking luscious for longer.

Parting words

Thanks for reading! We hope this article was helpful in teaching you everything you need to know about the perfect ratio of bleach to developer. Good luck with your new color, and happy bleaching!

Authors

  • Nicola Freeman, Creative Director & Content Lead

    With over two decades of passionate hair dyeing experience, I've experimented with nearly every shade imaginable. My journey began long before blogging; as an award-winning copywriter in London and New York, I shaped narratives for iconic brands. However, when friends sought advice during lockdown for at-home hair dyeing, I realized my true calling. Beyond being your hair color expert, I'm a mom of two girls, wife to artist Tony, and an avid soccer player!

  • Enza Piazza, Hair Stylist & Color Consultant

    I’m Enza Piazza, your go-to hair stylist and color consultant with over 23 years of professional salon experience bringing vibrancy and life to hair of all hues. My Italian roots from sunny Sicily infuse passion into every snip and color, a passion that’s been recognized with top honor awards including bridal and party hair at the National Hairdressers Federation’s Championships. After training in Surrey, UK’s most prestigious salons including Head Master Academy, I embraced the entrepreneurial spirit and set up Enza Hair Styling, offering tailored hair care for 13 years, and treating each client like family. Away from the salon, I cherish moments as a proud Nonna to grandson Joseph and as a playful companion to my Jack Russell, Bo.