you need a 10 or 20 developer. Nothing higher. Since your going from light to dark you dont need to use a strong developer to lift color out.
The only thing that will occur when using 30 V. developer when coloring a dark color is that the color will not take as dark as it should. It will probably turn out to be a little lighter than expected.
If developer is stored at room temperature and out of sunlight, its shelf life is approximately 2 years, regardless of the volume.
Redken Color Gels Processing is as follows: Mixed with 10 volume developer: Process 20 mins. at room temp. Mixed with 20 volume developer: Process 30 mins. at room temp. Mixed with 30 volume developer: Process 40 mins. at room temp. Mixed with 40 volume developer: Process 45 mins. at room temp. It's the DEVELOPERthat determines the processing time, not the color.
It depends on however big the room is
you use 20 volume developer on gray hair
Dark Room - album - was created in 1980-06.
Dark Room - 2005 is rated/received certificates of: USA:PG
In the Dark Room - 2013 is rated/received certificates of: Finland:S
The Dark Room - 1982 is rated/received certificates of: Australia:R
A way for a person to not be afraid of the dark if there is another room somwhere that is dark is to simply have mental power. It's best to remember that there is nothing in the dark that isn't there in the light.
Dark room