I ask because I am in a situation where I am storing quite a few mounted prints in less than ideal conditions. Mainly temperature; down to about 55f. No corners have lifted, but I swear on one particular 16X20 there is a 1/32 inch strip of dry mount tissue exposed at the top that I had not noticed before. Could the print contract that much without releasing? Any insights would be helpful. Or maybe not, as I really cannot change my storage situation. The prints are stored flat, and temp changes back to something closer to 70f will not be rapid.