How to Dilute 40/30/20 Volume Developer

When diluting a developer for hair dye, there are several factors to consider to avoid mistakes and potential damage to your hair and scalp.

The developer contains hydrogen peroxide and is used to open up your hair cuticles so that the color deposit on your hair shaft is permanent.

Improper dilution of hair developer during the dyeing process can pose several risks, such as achieving a lighter, short-lived color, and experiencing uneven, patchy results.

To get a 30 from a 40 volume developer , combine 3 parts of 40 volume developer with 1 part of water – in a 3:1 ratio.

40 volume developer to 30

1

40 volume developer to 20

Combine 1 part of 40 volume developer with 1 part of water to get a 20 volume one. The ratio followed is 1:1.

2

40 volume developer to 10

To get a 10 volume developer from a 40 volume one, we need to significantly dilute the 40 volume developer, in a ratio of 1:3 – that is mixing one part of water with 3 parts of 40 volume developer.

3

30 volume developer to 20

The ratio for getting a 20 volume developer from a 30 volume one is 2:1. This means mix 2 parts of 30 volume developer with 1 part water.

4

30 volume developer to 10

Mix 1 part of 30 volume developer with 2 parts water to get the 10 volume developer from a 30 volume one. The ratio is 1:2.

5

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