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ANSI A135.4-2004 Basic Hardboard
This Standard defines hardboard, covers the requirements and test methods for water absorption, thickness swelling, modulus of rupture, tensile strength, surface finish, dimensions, squareness, edge straightness and moisture content of five classes of basic hardboard. Methods of identifying hardboard that conforms to this Standard are provided.
This Standard may be revised or withdrawn at any time.
Newer version (2012) of this Standard is available.