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Mounting boards warping

Elliot Burg

Grumbler in Training
I've been displaying 16 x 20 photographs dry-mounted onto rigid boards called Eco Boards from Kool Tack. With that system, the photos are easy to mount and trim. There's no frame, mat or glass--nothing between the viewer and the image. On the back, I've epoxied D-rings, with West Six-10 epoxy, to which I've attached fishing line to hang the photos from picture molding at my show venue.

They look great ... except that the boards/photos have begun to bow slightly from the top. It's not the epoxy, which is highly stable, according to West. Does anyone have any idea as to what the problem may be, and how to fix it?

Eternally grateful,

Elliot Burg
Middlesex, Vermont
 

Jim Miller

SPFG, Supreme Picture Framing God
Explain more about what you mean by "bow slightly from the top". Can you post pictures?
 

Dave

SPFG, Supreme Picture Framing God
I'd call and talk to Len Lastuck at Frame Specialties about the issue. They are the manufacturer/distributors.

800-777-3165
 

Daniel Smith

True Grumbler
You are putting pressure on the back that is not even. The weight of the mounted image pulls in the direction the image is hanging from.
Probably need to put a stiffener on the back between the hangars to keep the board stiff so it does not bow on you.
 

charming

True Grumbler
I used Kooltak for photos because of the lower mounting temperature than tissue, and I always placed a 1/2" MDF board on top of the inverted work when I took it out of the press. That eliminated a lot of bowing.

However, I switched to LJ's Mountcore which is a denser foam core. Ideally I would use a Kooltak Mightycore if available,
 
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