The Real Reason Aluminum Foil Has a Shiny Side and a Dull Side

The Real Reason Aluminum Foil Has a Shiny Side and a Dull Side

It’s Not Just for Looks — Here’s What You Need to Know

If you’ve ever pulled out a sheet of aluminum foil and paused to wonder, “Why is one side shiny and the other dull?” — you’re not alone. It’s a question that’s puzzled many home cooks, and it turns out, there’s a real reason behind it.

But is there actually a right side to use when cooking? Or is it just a manufacturing quirk with no real purpose? Let’s break it down.