Sign board is layered like plywood, and has a coating on the front and
back.  I don't know what the coating is, but someone told me it is a type of
paper.  But it does not peel like paper.  It may be a chemical treatment
that resembles paper.

I learned about it from a maker of jig saw puzzles.  He uses it in 1/8"
thickness.  Then I had it confirmed (as 'sign board') when I went to a sign
shop to get a sign made.  They had it everywhere, principally in 3/4"
thickness.  They buy it by the pallet-full.  I forget what they told me they
paid on a per sheet basis, but I remember figuring it was 1/3rd of what I
pay the lumber yard!

Lloyd

-- 
Lloyd Spear
Owner Ross Rounds, Inc.
Manufacture of equipment for round comb honey sections,
Sundance Pollen Traps, and producer of Sundance custom labels.
Contact your dealer or www.RossRounds.com

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