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20 Volume (or 6%) developer will lift hair 2 levels and 40 Volume (or 12%) will lift hair 4 levels.

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Q: What is the difference between 20 volume and 40 volume hair developer?
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Related questions

What volume creme developer should you use for gray hair if you have brown hair and dying it a dark blond?

you use 20 volume developer on gray hair


What does 30 volume do for hair color?

30 volume developer will lighten the hair three levels.


Can you use a 30 developer with a toner FOR HAIR?

20 Volume developer should be used when toning hair.


Can you lighten your hair with a 30 volume developer alone?

No you need the powdered bleach with the developer.


What volume developer do you use to highlight hair?

30


Does Chi hair color have bleach in it?

No, it lifts your natural hair color by use of the developer. The higher the volume of the developer the more lift you will get in your hair.


Can you use 20 volume creme developer alone on hair?

When used alone, developer will do nothing to the hair. It is made to be mixed with a hair color.


What is the difference between 20 and 30 volume creme developer and which is better for dark colors?

The difference between the volumes of developers is that 20 volume gives 2 shades of lift, and 30 gives 3 shades of lift. If you are coloring you your hair darker than your natural hair you want 20 volume and also if your only going up 2 shades of your natural color you would use 20.


What volume of developer do you use on beards?

A 20 volume developer will be sufficient for coloring facial hair, especially if there are some grays mixed in.


What volume do you use to darken hair?

A 5 or 10 volume developer are best for darkening, or depositing, hair color.


Is 40 volume developer more damaging to hair?

yes


What developer should you use to dye your hair blonde?

20 or 30 Volume developer is recommended for blonding.