acyrlic and spacers

Grumbling Mike

CGF II, Certified Grumble Framer Level 2
Jul 13, 2000
Toronto Canada
I have a 42x62" canvas backed vintage poster in for framing. In this case the client doesn't want a mat we are using Nonglare acrylic and I am wondering about using 1/8 spacer. my questions are; are we going to have a problem with static,
will we see the poster bow out, I was thinking of hinging the canvas on the backing board across the top
Your thoughts and experiences are always welcome
On a piece this size I wonder how effective 1/8" spacer will be. Is there enough canvas to stretch the canvas? If so stretch it with a support board under the poster. add strips of black foamcore to the sides extending up 3/8" or more then frame like normal. This way the print can't fall out frome behind the spacers, and the poster won't "bow out" from static. THis will require a deeper rabbit but will provide a firm package for an oversized job.
Dave, I wondered about using 1/4" spacers but figured the NonGlareacrylic would get a bit fuzzyhow would you stretch it? around a frame?
I have 1.5" of canvas before the poster edge. We would like to show the edge of the poster.
Mike I missed the part about the NG. Your screwed

As to the stretching, make your stretcher bars the same size as your poster. Wrap the canvas around. You cant pull to much for fear of tearing the poster. I always do the top first then lean it up to let gravity help in doing the bottom.

Because the spacer strips are attached to the sides they do not cover any of the poster.
Use the new Tru-Vue Optium Museum Acrylic. It's Cyro Op-3 with the same anti-reflective coatings used on Museum Glass. And the coatings make it somewhat anti-static.

If you use a stacked frame consisting of a normally-mitered moulding and another one turned vertically on the perimeter, you can make it wide enough to cover the canvas part (assuming about 1-1/2" canvas border), and deep enough to provide plenty of air gap.

Make your 'spacer' by layering polyflute or alphacellulose board strips on top of the canvas border, under the normally-mitered frame. Cover the edges of the layers with shadowbox sides of complimentary board color.

That will hold down the canvas edges. You can hinge the canvas instead of stretching it (linen pass-through hinges suggested). And you'll have plenty of space between the poster and the acrylic glazing. I have photos of this design. If you want to see them, let me know privately.

Ooops. The Optium Museum Acrylic comes no larger than 41" x 71". Is your 42" dimension for the image or the canvas?
Originally posted by FrameMakers:
Mike I missed the part about the NG. Your screwed
I think you're in the same position on the Museum. To bad, it's nice stuff. Just finished a large Hopper. 39x69, very sweet to work with.

If the customer isn't getting to crazed about "Museum" framing . . . I might point out that a lot of these "vintage" oversized posters "concervation" mounted to ph neutral "museum quality" linen . . . are just oversized inkjet prints of ad posters that were never printed in single sheets that size....

They are being "offered" at "antique" auctions. We've now done about 7 of those $*(&%^%&**&&^%!@## things.

The customers usually "stole" them for only $1,100, and then scream bloody murder when you use the "Thousand" word for framing....
This is a real vintage movie poster, our best efforts are required in its conservation so these insights are greatly appreciated.

41x71 is a bizzare size but limitations have their reasons, just like the Y2K date field thing had a reason, and within them we work.

We will not be able to trim the canvas but if I can make a double rabit frame we can make this op3Museum work and just cover up 1/2" of the canvas border -that should make it more stable

moments later...

ouch... I just got a price on it (681cdn)
(It looks kinda yellow for that price)

I'm going to go NG-Plexi hinged with double rabit
sealed with alphacel strips
its black ink on white paper going in a windowless theatre room so I and client are not too worried.