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How to stop mount gaping on a large (32" x32") multi aperture mount?
Normally would stick the mount over the images but in this instance all the 9 - 8"x8" images are on Fine Art paper so have hinged them all to a mountboard and laid the double mount over.
Guess it is to do with the size and the back board bowing slightly? used 2.5mm MDF
rebate isn't that deep... 11mm .... to pack with anything solid.
Cut a bit of mountboard an bit bigger than the middle window. Clip the corners of about 1". Tape it to the back of the backboard in alignment with the middle window. With luck it should keep things flat. Or flat-er at least. At the same time, flip the MDF back over so if it has a slight curve it will curve in not out.
It's a method I have used many times when you want just a tiny extra bit of pressure in the right place. The secret is snipping the corners.
You could try a slightly thicker bit on something that size (3mm foamcore???), but don't overcook it.
Hello Chris. Just done one similar size for 9 photo's in a fairly shallow ash moulding. I use Art-Bak which claims to be bowed to keep things flat. You can barely notice any curvature but It seems to work as it is flat against the glass.
There's more to the picture, than meets the eye. Hey hey, my my.
Ok.... had this frame back AGAIN today due to bowing
Tried Prospero's trick but to no avail.
It's 9 - 8"x8" Fine Art prints in a 9 aperture mount so didn't want to stick the mount down.... although easily replaced as I printed them myself on Canson Platine.
Any more thoughts until I incriminate myself and stick it down
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If you can glue the window mount down to the undermount without glue getting on the prints then I would use something like Evacon-R.
Depends on how close the prints are to one another. Sometimes, certain jobs need to go with how it looks rather than reversibility, and in this case everything is replaceable, so I would glue it down and have a cuppa tea while it dries
I would Build up the back of the frame with some plain 10mm pine you can get it from B&Q in various widths,
Then use at least 5mm Foam Cor, although 10mm would be better, which should leave 2mm for an extra backing board if required.
