Why is Aluminum Foil Shiny on One Side?, by Harlan Brothers
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Why is aluminum foil shiny on one side, and not the other? - Quora
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Shiny vs. Dull Side of Foil: Which Should You Use?
Why is aluminum foil shiny on one side, and not the other? - Quora
This Is Why Aluminum Foil Is Shiny on One Side
Shiny Side or Dull? Which Side are You on with Aluminium Foil