Originally Posted by Ian Dale
Good quality (3M or scotch ) double sided tape cut into strips holds thin plastic for glazing quite nicely. If you use acetate thinned dope can be used to dope tissue frames to cover the tape. Sounds a bit of a fiddle but is quite easy to do and no risk of getting glue all over your glazing.
I stick to Ian's sentence!
It's a good way to hold thin plastic, specially if the wood frame is properly doped and sanded.