In a message dated 9/23/99 10:38:37 AM Pacific Daylight Time,
> Saran Wrap is Polyvinylidene Chloride, and its dielectric constant is
> between 4.88 (60 Hz) and 3.18 (1 MHz), so using 4.0 is not a bad
> estimate at TC frequencies. At 1 MHz, it's over 700 times as lossy as
> LDPE, so it's a rather lossy dielectric if you're thinking about using
> it as a capacitor dielectric...
> -- Bert --
I think Glad wrap is polyethylene. I remember reading it on the box.