Here I am!!!
Right so you have, what, 8.34?
And 20 volume peroxide?
Basically you mix 1 part dye to 1.5 parts peroxide.
So if you wanted to use the whole tube, because you were doing a whole head for instance, you would put the whole tube which is 50ml, with 75ml of 20 volume (6%) peroxide.
If you wanted to do a strand test before committing to a whole head (recommended!!! I am not a hairdresser! And a good one would do a strand test anyway!) then mix 1/2 a teaspoon of dye with 3/4 teaspoon of peroxide.
Mix it up, let it sit a minute or two, mix again, apply, 35 minutes, get in shower, lather up, rinse, shampoo, rinse, condition 3 minutes to let hair ph balance return to normal, get out shower, dry, dry hair, admire ginger glory, resume life.
Any questions PM me or reply (will look back shortly)
Mwah x