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Old 07-28-2009, 08:22 PM   #5
Festus2
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Join Date: Mar 2009
Location: Fraser Valley BC Canada
Posts: 7,015
Coroplast is a common "board" used in the sign business - especially outdoor advertising. It is available in varying thicknesses and I think the thickness of the underbelly is greater than you would find in most signs and posters. I also note that the Coroplast website gives a breakdown of the various dimensions and thicknesses. The larger thicknesses have a heavier skin on the outer layer which might provide better protection and stand up longer than a thinner one.
What about checking building supply places (Home Depot, etc.) as well as outfits tht make and sell signs? They might sell you a sheet but I think most of the sign places would not carry black.
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