Yes.
The developer needs to be mixed with a color first, such as a permanent color, or hair lightener.
I don't recommend you just adding the developer directly to your hair by itself, although I don't think much will happen since it's hydrogen peroxide or it will lighten your hair slightly.
Practice precautions.
no!!
Equal parts of 10V. Developer + 20V. Developer= 15 Volume Developer
Equal parts of 30 volume + 40 volume developers= 35 Volume Developer.
Equal parts of 5 volume developer + 15 volume will yield approximately 10 volume.
Redken Camo Color Developer is 20 volume.
To make a 10 volume developer solution from a 20 volume developer solution, you can dilute the 20 volume developer with an equal amount of distilled water. This will effectively reduce the concentration of the developer solution by half, resulting in a 10 volume developer. For example, if you have 100 ml of 20 volume developer, you would mix it with 100 ml of distilled water to create 200 ml of 10 volume developer.
Mixing 10 Volume developer and 40 volume developer will never make a 20 volume regardless of how much is mixed. In order to make a 20 volume, equal parts of 10 and 30 volumes will need to be mixed. Mixing 10 and 40 will make 30 volume.
Mixing equal parts of 20 V. and 40 V. developers will give you an approximate 30 volume developer.
What is the difference between 10 and 20 volume creme developer?
20 volume
Yes. 10 vol developer is 25% peroxide.
A 20 volume developer will be sufficient for coloring facial hair, especially if there are some grays mixed in.
If you mix them in equal parts, you now have 25 volume developer.