Phil,
We have had the same problem with our foamcore panels as well. One solution we have developed that has helped a bit is adhering long strips of foamcore horizontally across the back of the panel, which has helped the panel keep its form, although not perfectly. We have also had similar bowing problems with Sintra. If anyone has other solutions, we would be interested to know.

From: Museum discussion list [mailto:[log in to unmask]] On Behalf Of Phil Raino
Sent: Wednesday, January 26, 2011 12:44 PM
To: [log in to unmask]
Subject: [MUSEUM-L] Exhibit panels: Keeping them true.

Hello all,

Our library's exhibits invariably incorporate informational panels, ranging in size fro 24" x 36" to 48" x 72", digitally printed and mounted to foamcore. These mounted panels get hung within wall cases, or via chain from a hanging rail on walls. I've run up against a persistent problem with some batches of foamcore exhibiting notable warping and bowing (depending on the season as well). If indeed similar panels are being used by you all in your exhibits: By what methods, or with which products, can these panels be kept rigid and flat, minimizing or even eliminating the bowing?

The most obvious answer is putting the panels within oversize picture frames, but this results in... well, a distracting frame around the panel's graphics. Experiments with adhering unglassed picture frames to the backs of the foamcore panels have been less than successful. As we've no fabrication facilities on the premises, I've not been able to make wooden frames or supports.

Is it simply a question of opting for the much-more-expensive Sintra or another material that isn't as warp-prone?

Phil Raino
Exhibits Developer, Special Collections Research Center
The Estelle and Melvin Gelman Library
George Washington University

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