Message:

<p>[QUOTE=&quot;-jeffB, post: 8387652, member: 27832&quot;]I&#039;m not a polymer chemist (I&#039;ll try to remember to ask my wife, she was in the business ages ago), but it almost sounds like the old ones are <i>actual</i> Mylar (stretched PET) and the new ones are plain old PET. In fact, if you were getting soot and burning particles, <i>that</i> sounds more like polystyrene. It won&#039;t attack your coins like PVC, but it won&#039;t necessarily protect them as well, either -- although a <i>flip</i> doesn&#039;t seal tightly enough to exclude air, regardless.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in