30 Volume Cream Developer is generally used for high-lift color, blonding, and bleaching.
30 vol is stronger
If mixed equally, you will get 30 Volume.
Mix with 20 or 30 Volume Cream.
Equal parts of 10 & 30 V. developer will yield 20 v.
no, manufacturers instrustions tells you not to
Which developer you use will depend on the color you want to achieve. A 20 developer will give you a darker color than a 30 or 40 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.
It won't make it 30. The way developer works is 10 is no lift deposit only and makes hair semi permanent. 20 is 7-10 shades of lift with deposit and makes hair colour permanent. You have to buy 30 volume developer from a sallys beauty supply but 30 is very dangerous for the hair it can damage it severly I recommend sticking to just 20 volume
30
Equal parts of 30 volume + 40 volume developers= 35 Volume Developer.
you cannot. just use the 30 on its own.
20 or 30 Volume developer is recommended for blonding.