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ASTM D5590-00(2005)

Historical Reaffirmation

Standard Test Method for Determining the Resistance of Paint Films and Related Coatings to Fungal Defacement by Accelerated Four-Week Agar Plate Assay

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1.1 This test method covers an accelerated method for determining the relative resistance of two or more paints or coating films to fungal growth.

1.2 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.


Defacement of paint and coating films by fungal growth (mold, mildew) is a common phenomenon, and defacement by algal growth can also occur under certain conditions. It is generally known that differences in the environment, lighting, temperature, humidity, substrate pH, and other factors in addition to the coating composition affect the susceptibility of a given painted surface. This test method attempts to provide a means to comparatively evaluate different coating formulations for their relative performance under a given set of conditions. It does not imply that a coating that resists growth under these conditions will necessarily resist growth in the actual application.

Note 1—It is hoped that a ranking of relative performance would be similar to that ranked from outdoor exposures. However, this test method should not be used as a replacement for exterior exposure (that is, Practice D 3456) since many other factors, only a few of which are listed will affect those results.

Note 2—Several companies have reported reasonable correlation of results from this test with actual use when testing film-forming, pigmented coatings. Round-robin testing of this test method versus exterior exposure is planned.

Familiarity with microbiological techniques is required. This test method should not be used by persons without at least basic microbiological training.

SDO ASTM: ASTM International
Document Number D5590
Publication Date Dec. 1, 2005
Language en - English
Page Count 4
Revision Level 00(2005)
Supercedes
Committee D01.28
Publish Date Document Id Type View
Dec. 1, 2017 D5590-17 Revision
June 1, 2010 D5590-00R10E01 Revision
Nov. 10, 2000 D5590-94 Revision
Nov. 10, 2000 D5590-00 Revision
Nov. 1, 2021 D5590-17R21 Reaffirmation
June 1, 2010 D5590-00R10 Reaffirmation
Dec. 1, 2005 D5590-00R05 Reaffirmation