I'm looking for a sheet of clear plastic to go on the back of a picture frame.It needs to be about 110cm by 60 cm and I suppose abut 3-4 mm thick.Basically the same as you'd use as the glass bit on the front of a frame.What should I be looking for? Perspex,acrylic?Any ideas on cost or what types of places to look for would art shops do this sort of thing?Any ideas welcome, I'm in Liverpool in the UK but general guidance needed too!Thanks.
I probably have absolutely no idea of what you would use, but I would definitely check OKorder if you already haven't. You can find almost anything on there! Hope I could help :)
Afraid I really don't have a good answer to your question, but I do know that one photography trick for shooting through glass is to go to a thrift store or something and get a nice, unscratched piece of glass from a picture frame because supposedly the glass is glare free. Hopefully that helps you narrow down your search a little. A search for Liverpool Plastics brings up quite a few different businesses with phone numbers in your area. I'm not sure what kind of minimum order they might have, or how knowledgeable or time restricted the person on the phone might be, but it seems like it would be worth a shot to try that route. Online shipping charges can get pretty steep pretty quick.
OKorder is a good place to look, usually some one selling an off cut on there. If not look in the yellow pages under sign writers / plastic fabricators they might have an off cut they could supply you.
I would go to the hardware store, they should have various sizes of plexiglass for window replacements.