Heat transfer printing Metals

Hello all,

I want to find out where to start with heat transfer printing, I
have seen it used really effectively with anodised aluminium and as
this is the material I have I would love to experiment. Do I need
any particular type of heat transfer press to work on metal and then
is it a case of a fancy printer that uses printing/alu dyes as the
printer inks?

Would be very grateful if anyone can help as I cant find anything
metal printing related of use.

Thanks
Lou