I bought ice cream oxidizing perfumed emulsion cream to take out my hair color. How much do I use and How long do I keep it in for?

This is a european treatment and I hate to say it, but they are so much way ahead of us with beauty treatments. If you visit Folica.com you will find out all you need to know regarding this innovative treatment. I couldn't even find it mentioned on any Toronto web sites. Where did you buy it ?

I bought it at Shopper's Drug Mart in London. Thanks for your help