Another possible test for PVC, requiring only a tiny sample of tape, is to try dissolving a piece in a drop of acetone. I believe (and would welcome a chemist's confirmation) that PVC dissolves but Polyester doesn't.
Acetone fumes are not nice but burning plastic is surely worse!
From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]] On Behalf Of Katie Mullen
Sent: Tuesday, 21 February 2012 10:47 a.m.
To: [log in to unmask]
Subject: Re: [ARSCLIST] offgasing from baking tapes
Awesome, thanks again! I *had* read your paper, but had not known about the
other resources on your site - will check them out!
>PVC tape is very rare and should not be baked, but I don't know how you
>differentiate it from PET.
If you really needed to and were able to do some destructive testing on the
The Beilstien Test for Chlorides in plastic:
Use your respirator :)