Hi folks,  I have a very elegant roll cabinet that would be excellent
excepting for the fact that someone discarded all of the original
shelves.  I tried installing some Luan plywood in the slots, but it
sags so badly when loaded as to be unusable.

I'd be grateful if someone could tell me what the manufacturers used
when this was built.  Clearly it wasn't Luan ply!

Many thanks!
Bob Hodge