making my own transfer sheets

Hello there!

I want to make my own transfer sheets. I have acetate sheets, cocoa butter and some good quality colour powders. Do I need to temper the cocoa butter so that it does not bloom? If so which temperatures do I follow - those for white, milk or dark?

I have looked through numerous videos and this question in not answered. Mostly the cocoa butter is heated (I do not know to what temperature) and painted on in various techniques. Is this bloom proof?

Many thanks

Shanta