Oh my, seriously didn’t know about this.

Why One Side is Shinier Than the Other

The difference in appearance between the two sides of aluminum foil is purely a result of the manufacturing process, specifically the final rolling stage. The side that comes into contact with the polished steel rollers gets a smooth, reflective finish, making it shinier. In contrast, the side that does not touch the rollers retains a matte finish, thus appearing dull. This difference has led to various theories and myths regarding the functional differences between the two sides.

Functional Differences Between the Shiny and Dull Sides

Contrary to popular belief, there is no significant functional difference between the shiny and dull sides of aluminum foil in terms of cooking performance. Both sides are equally effective as barriers to moisture, light, and air. However, the shiny side is more reflective of heat, which can be slightly advantageous in certain cooking situations. Yet, for most culinary and household tasks, the choice of side is largely a matter of personal preference.

Best Practices for Using the Shiny Side