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ASTM D3363 2005 Edition, January 1, 2005
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Standard Test Method for Film Hardness by Pencil Test
Includes all amendments and changes through Editorial Change 2, March 2012
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This test method covers a procedure for rapid, inexpensive determination of the film hardness of an organic coating on a substrate in terms of drawing leads or pencil leads of known hardness.

This test method is similar in content (but not technically equivalent) to ISO 15184.

The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

*A Summary of Changes section appears at the end of this standard.