wow, flat and light weight! this aluminum dibond looks like exactly what we
need for a portable calibration target. Thank you! I will try find a local
print shop and check it out in person. 

Hang

got off a http://www.seenby.com/ page:
Aluminum Dibond is a sound composite of two aluminum plates and a PVC core
(the “bond”). Despite its very light weight, it guarantees a level surface
and has great resistance to deformation. Once the image is printed, it will
be permanently mounted to the surface of the aluminum dibond board with a
special adhesive making it perfectly smooth and exact. Once mounted, the
image will be laminated for protection against damage and ultraviolet light.
The back of the board has rails that serve as the hanging mechanism,
allowing for a frameless gallery look. 
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