Hi,
I tape my prints with a small piece of masking tape at the center top & bottom & center sides. I the tape the print to the mount, making sure the print is centered. I then glue the mount & print to a back board using photo mount spray glue. Never had one wrinkle of fade yet & they look great in the polythene bags i sell them in. The back boards are well worth the extra 30p or so per print.
Regards
Rob
l & r wildphoto