10
darker!
depends on if you are going lighter or darker from your original hair color. if lighter do a 20 if darker do a 10
Which developer you use will depend on the color you want to achieve. A 20 developer will give you a darker color than a 30 or 40 developer.
10 volume developer is used to deposit hair color. if you have a lighter color and want to go darker you should used the volume 10.
To lift or make lighter you want to use, 30, and 40 Valium developer. To darker you use 10 and 20 Valium developer. Also to go lighter use a hair dryer. For darker room temperature. Colour should never be left in the hair longer then the time recommended, it over processes and the fades much fast.
I would say it depends on your hair type and what kind of developer you used
Adding Ardell Unred to 30 V. developer will not have any affect on the hair. Unred is made to be mixed with both hair color and developer, not developer alone.
Will heat destroy hair developer
Accurate mixing of hair color and developer are very important in order to have even color coverage and precise, true color results.
Yes, cream peroxide is developer.
your hair will get darker just like it would do to your skin
one ounce hair color, 2 ounces developer. OR 2 ounces hair color, 4 ounces developer