We had someone who wanted help making an off-the-shelf sandwich board that could hold paper posters. We used a large laser cutter to cut acrylic to hold the paper in place and make it easy to replace.

Additional Processing After Printing

I print these in PLA, then I put the ends about 6-8 millimeters (1/4 inch - 3/8 inch) into hot, but not boiling, water to soften the PLA, and give the ends a slight bend to increase the contact pressure on the Acrylic. This is shown in one of the attached photos.