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ASTM D3363-05(2011)e2

Historical Revision

Standard Test Method for Film Hardness by Pencil Test

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1.1 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.

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

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

1.4 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.

Pencil hardness measurements have been used by the coatings industry for many years to determine the hardness of clear and pigmented organic coating films. This test method has also been used to determine the cure of these coatings, especially when forced dried using heat.

This test method is especially useful in developmental work and in production control testing in a single laboratory. It should be recognized that the results obtained may vary between different laboratories when different pencils as well as panels are used. Every effort should be made to standardize the hardness of the lead used and the technique followed.

If this test method is used as a basis for purchase agreement, maximum precision will be achieved if a given set of referee pencils be agreed upon between the purchaser and the seller.

SDO ASTM: ASTM International
Document Number D3363
Publication Date June 1, 2011
Language en - English
Page Count 3
Revision Level 05(2011)e2
Supercedes
Committee D01.23
Publish Date Document Id Type View
June 1, 2022 D3363-22 Revision
Sept. 1, 2020 D3363-20 Revision
June 1, 2011 D3363-05R11E02 Revision
June 1, 2011 D3363-05R11E01 Revision
Jan. 1, 2005 D3363-05 Revision
March 10, 2000 D3363-00 Revision
June 1, 2011 D3363-05R11 Reaffirmation