Everything about how much 20 volume developer to mix with hair color will be explained in detail on this topic. 20 volume developer is used for lifting the hair color level by around 2 levels, it’s the most common one between all of the hair developers.
The mixing ratio of hair color and developer is varied, usually 1:1 or 1:1.5, sometimes 1:2. But to know the exact amount of 20 volume developer to mix with hair color, you need to understand how it works and which hair color it suits best with.
What does 20 volume developer do?
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20 volume developer helps to lighten your hair color from 1 to 2 levels, the strength depends on how much you use it. But how much 20 volume developer to mix with hair color also depends on your hair’s thickness and length, so in some cases, a larger amount should be more preferred than the standard recipe.

It’s also the most suitable product for covering grey hair. For your information, the 10 volume developer-only fits the situation when you have lower than 25% of grey hair, but above than 50%, then 20 volume developer is more famous for the 100% grey coverage which would wipe out all the black hair spots you have left.
Furthermore, if 20 volume developer isn’t the most suitable one for you, then there are other choices for either darken or lighten your hair. They include 10 volume developer, 30 volume developer, 40 volume developer, …; and you can find all of those hair developers’ information from our other topics.

Which hair color that 20 volume developer suits best?
From time to time, people always say that 20 volume developer is only for 100% grey coverage. Well, the statement isn’t entirely wrong but that’s just a stereotype that can not apply to this day anymore. Since years ago, people have used 20 volume developer to mix with different hair colors, some of the results are not a good choice, but some are perfectly matched.
When we think about how much 20 volume developer to mix with hair color, we must have thought about the color first. However, there are hair colors that were picked by most of the people for best suits with 20 volume developer:
Grey color
Back to the basics, nobody can deny that 20 volume developer is best for 100% grey coverage with a long-lasting amount of time keeping the color on the hair.
Brown color
When you have brown hair and you want to lighten your hair up a little bit but not too much, then 20 volume developer is perfect for this situation without any doubt.

How much 20 volume developer to mix with hair color?
Usually, the mixing ratio of hair color and 20 volume developer is 1:1, it means the amount of hair color you want to use is equal to the amount of 20 volume developer you mix with. The total amount of mixture depends on how thick or long your hair is so that it can cover every part of your hair.

But, if you want to make the effect stronger, to lighten your hair even more, then you can consider using a 1:1.5 or 1:2 mixing ratio. However, using too little or too much hair developer may cause the result look not as good as what you expected, or sometimes not good at all.
Finally, how much 20 volume developer to mix with hair color when you want to cover all your hair with grey? The answer is just simple, 1 part of hair color mix with 1 part of 20 volume developer should be enough for an excellent result since this method is famous worldwide.
A small tip for anybody that is wondering how to measure the correct mixing ratio: You can take two small glasses with the same size, one glass is for the amount of hair color, and the other glass is for a part of hair developer. After that, use a kitchen scale to see the weight of both glasses, so you can figure out how to balance those two.
How long to leave 20 volume developer on our hair?
The recommended time for leaving 20 volume developer on our hair is more than 20 minutes and less than 30 minutes. But let’s look back at the title: “How much 20 volume developer to mix with hair color?”, some people might question: does the time be affected by the mixing ratio? The answer is just a little bit, but even the 1:2 ratio wouldn’t prolong the time duration to more than 30 minutes.
In the case that you remove the 20 volume developer sooner than 20 minutes, your hair might not keep the color for a long time, also there may not be the slightest change in the color. And if you forget to remove the 20 volume developer after 30 minutes, your scalp would be in pain and the color would no longer be active.
Is 20 volume developer strong enough?

Before getting to the answer, you should know the hair color you want to dye, so you can understand 20 volume developer is strong enough for what purpose.
If the reason is to achieve a darker color, then 20 volume may not be the best option. Because, 20 volume developer is commonly used for lightening the hair, but you still can darken your hair with it as long as the color dye that is chosen must be darker than your hair at that time. Other than that, 10 volume developer is guaranteed the best solution for this situation.
In case you just want to lift your hair color tone a little bit, then 20 volume developer should be just enough. If you want the lifting effect even stronger, then you should consider how much 20 volume developer to mix with hair color, which you can check out the information above. Or, you can still use other hair developers that suit your desire. The decision is all up to you!