Why does aluminium foil have a shiny and a dull side?

Why aluminum foil is shiny on one side

Why Aluminum Foil Has a Dull Side and a Shiny Side - Reynolds Aluminum Foil Wrap

Fish N Pig - Ah the ago old debate about tin foil. Does the shiny side cook food faster than the dull side? In theory, the shiny side would reflect more heat

Why aluminum foil is shiny on one side

Why is only 1 side of aluminum foil shiny?

Lynette Muller - Tin Foil Fact Let's Learn (Kaalvoet

If using non-stick foil, follow the manufacturer's recommendation #lea

The difference between the shiny and the dull side of aluminium foil

People have just learnt they've been using tin foil wrong their entire lives - and their minds are blown

What's The Difference Between The Shiny And Dull Side Of Aluminum Foil?

Aluminum Foil with Shiny and Dull Side - China Aluminium Foil, Aluminum Container Foil

Why Aluminum Foil Has a Dull Side and a Shiny Side - Reynolds Aluminum Foil Wrap

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

Aluminum Foil: There Is Only One Shiny Side? Why Is That?