n Pyramidal diamond of prescribed dimensions used for testing the indentation hardness of organic coatings. In a more restricted sense, a type of diamond hardness indenter having edge angles of 172°, 30° and 130°. (Handbook of physical polymer testing, vol 50. Brown R (ed). Marcel Dekker, New York, 1999; www.astm.org).
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Gooch, J.W. (2011). Knoop Indenter. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_6694
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