337961 Sat Oct 28 19:02:43 -0700 2006 3 31 Home Cooking 0 1979682 does it ever make a difference if you use the shining side as opposed to the unshining one for different purposes? Sat Oct 28 19:02:43 -0700 2006 11492 sandramrma 1 1979689 No, not unless it is the nonstick foil. It only has one nonstick side. The different sides are just a product of the manufacturing process. -Becca Sat Oct 28 19:05:10 -0700 2006 1979682 11259 Becca Porter 1 1979763 I think on Good Eats, Alton showed that it makes about a one or two degree difference. I always go shinny side towards food. I would think it would think that shinny would reflect heat more than dull. DT Sat Oct 28 20:06:55 -0700 2006 1979682 11291 Davwud 1 1980036 The different surfaces in aluminum foil is because of the production process. The foil is too thin/weak to be produced by the single sheet, so they double up the layers, and the tension will not tear it. The shiny outside surface get polished when the go through the rollers, and the dull finish is because it was on the inside. Oven heat is convective, and the varying surface finishes do not affect how it performs. Sat Oct 28 23:12:49 -0700 2006 1979682 22220 Kelli2006