Does a sheet of reflective Mylar contain any metal?

Question

On a recent edition of Time magazine is a sheet of what they say is Mylar. It looks just like metal foil. It acts as a good mirror whichever angle you hold it, so total internal reflection isn't involved. Is it just clear plastic backed by a metal film? If not, how does it work?

Answer 1

yup, a vapor deposit of aluminum, and yes it's conductive.

Answer 2

I believe that it's a thin layer of metal on plastic but I'll check Wikipedia:


Well, how about that, I am wrong!
Metallized nylon (or "foil") balloons used for floral arrangements and parties are often mistakenly called "Mylar", one of the trade names for boPET film.