For how many minutes do you put 20 volume developer in your hair?

Answer by  maalti (34)

20 volume developer should be applied for 40 minutes to get the full development of the hair colour or the hair dye applied.

Answer by  Judeeeds (92)

The length of time depends on the hair color manufacturers' directions. Medium brown hair wishing to cover gray hair would be left on for 15 minutes.

Answer by  Mary (2095)

This depends on what effect you are trying to get from the developer and whether you apply any heat. You should seek the help of a professional stylist.

Answer by  vanessa83 (61)

The amount of time you leave 20 volume developer depends on the shade and thickness of your hair. I usually leave 20 volume developer in my hair for 10 minutes.

Answer by  shijo (861)

Not more than 15 minutes. If the hair is soaked for more than 15 minutes then the roots of the hair gets damaged and you need you treat for that also.

Answer by  Puppyluv (173)

For as long as the colorant's instructions say, each brand of color has a chart that tells you how long to leave it on to get your desired results.

Answer by  Anonymous

You CAN leave it in for 45 minutes. I've bleached my hair a million times. I know. 20 Developer takes longer to process, there for needs more time to do so. 10 minutes wont do anything. 30 is okay I guess. 45 minutes is what you want.