Aluminum Foil

[Fishward]

Originally Posted by Seafan

It's shiney side in, If shiney side is out it reflects the heat off of whatever it is your cooking.

shiny-ness has nothing to do with heat conductivity. the maufacturer is perfectly right. it makes absolutely not a lick of a difference. you use aluminum foil not to reflect heat, but to keep in moisture, while conducting as much heat as possible.