Choose developer strength according to how many levels you need to lift. Use 20 Vol developer for 1-2 levels, 30 Vol for 2-3 levels & 40 Vol for 3 levels. If you are going more than 3 levels lighter, you will need to use bleach first. Stick to the recommended color and developer mix rules.

How much developer do I use with 2 oz color?

Use ratio is two to one. For example, if you’re using 2 ounces of color, use 4 ounces of developer. 4 of 5 found this helpful.

How much hair color and developer do I use?

The traditional way of mixing hair developer and hair dye is a 1:1 ratio. If you put in 100ml of hair dye, then you must put 100ml of the developer too. But if you want to lift the colors, the correct combination would be one part hair color and two parts hair developer.

What Happens If I Put Too Much Developer In The Dye? Your mix will be more wet, & more runny. If it is way too runny, you may end up lightening the hair, but not depositing enough color. It will end up thinner, flatter and last less long.