lid wrote:

On 20 Oct 2003 16:29:08 -0400, Don Saklad
wrote:

Would there be any advantage using aluminum foil in the oven on pans by
placing the foil dull side up?...

So far with respect to the question, resources explaining this do not give
technical reasons for their explanations.

Shiny side reflects more heat than the dull side.

Shiny side reflects *light* less diffusedly than the dull side. Heat
isn't reflected.

Pastorio