Q1 : What is the fifference between 4 ply or 8 ply matbaords? Ply is the thickness of the matboard. The most common thickness used is 4 ply (around 1/16th of an inch) and double thick matboards are 8 ply or roughly 1/8 inch thick. The higher the number, the thicker and more rigid the board. Ply means a thickness or layer.
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