Ran out of 20vol developer

[Niamhie]

Hi I'm doing an older ladies hair which is level 4 the roots family member always do her hair. Just realised just a little bit left of vol 20 is there any way around it. I've plenty of vol 10 and 30 . Instead of having to wait till shops open.probably 10 wouldn't give coverage, would 30 fry her hair totally. How about mixing the two.

 

[ronray]

30vol would give you more lift, 10 vol may vover depending on the brand.
You can use equal amounts of 10 vol and 30vol.
Or you can dilute 30vol with water. But my personal choice would be to mix 10vol + 30vol because its the most stabalised option.

 

[AcidPerm]

As @ronray suggests. Mix equal quantities of 10vol and 30vol to make 20vol.

 

[Niamhie]

Did that turned out good the same