The only way to make a 20 volume would be to mix equal parts of 30 and 10 volumes.
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.
40 volume developer is used for high lift shades and will lift hair 4 levels. 20 volume developer is also used for lifting but will only lift 2 levels. 20 volume is used as well when going darker or for gray coverage as it lifts and deposits at the same time.
NO. If you mix them in equal parts, that would give you 35 volume. To get 15 volume, mix equal parts of 10 and 20 volume.
20 Volume (or 6%) developer will lift hair 2 levels and 40 Volume (or 12%) will lift hair 4 levels.
Volume = 1/3*pi*202*40 = 16755.16082 or about 16755 cubic feet
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.
Yes, it is possible.
Good idea, but unfortunately that won't work. There's no way to make a 40 volume, you will need to buy that separately.
40 volume developer is used for high lift shades and will lift hair 4 levels. 20 volume developer is also used for lifting but will only lift 2 levels. 20 volume is used as well when going darker or for gray coverage as it lifts and deposits at the same time.
40 & 20 volume developers.
NO. If you mix them in equal parts, that would give you 35 volume. To get 15 volume, mix equal parts of 10 and 20 volume.
20 Volume (or 6%) developer will lift hair 2 levels and 40 Volume (or 12%) will lift hair 4 levels.
The mass of 40 grams is 40 grams and the volume of 20mL is, wait for it, ... 20 mL!
Mixing equal parts of 20 V. and 40 V. developers will give you an approximate 30 volume developer.
It won't give u exactly 30 more like 35 vol if u mix 20 and 40. If u want closer to 30 put a little more 20 then 40...
Mixing equal parts of 40 volume and 10 volume developers will result in 30 volume.
2 g/cm3 Because density = mass / volume so u do 40 divided by 20 and get 2