You have to be careful what a "Rapid"
solution really is. Here in the UK there are some suppliers who rely on high percentages of DHA - as much as 20% rather than the all important ingredients which speed up the process. So basically all they are doing is relying on the Maillard reaction. I'm sticking with my usual
solution supplier and using Unreal Rapid. At least I know what's in that! Fabulous colour every time.