50/50 mix and it should be left to develop roughly 45 mins depending on the brand. please read instruction leaflets if in doubt.
Hair highlights: What is ratio of peroxide to colour and how long to develop? Thanks?
as a salon owner I have to say if you don't know this already you really should not be doing it yourself, your hair is your crowing Glory don't ruin it please, I could tell you the rate but again i have no idea the volume you would be using
and I would not want the blame go to a salon please, or use a model night much cheaper and 100% supervision as well
best wishes
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