This specification designates woods to be used as panels in weathering tests of coatings such as solvent-borne or water-borne paints. Different wood species shall be considered for testing due to their wide variations in the anatomy and density. Wood species materials for test panels include western red cedar, white pine and Ponderosa pine, southern pine, redwood, and Douglas fir. Wood panel characteristics such as weight per volume, wood character, panel thickness, surface smoothness, relative humidity, and growth rings density shall be in accordance with the specification.1.1 This specification designates woods for weathering tests of exterior solvent-borne or water-borne paints and other materials of similar purpose. Such tests may include either outdoor exposure tests or accelerated laboratory tests. It is the purpose of this specification to minimize the influence of variation of wood of a given species on test results.1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
3.1 Researchers in the field of coatings have recognized the need for a standardized substrate for evaluating coatings intended for use on cementitious surfaces. This practice describes the preparation of such panels.1.1 This practice covers procedures for molding and curing cementitious panels for use in exposure testing of coatings designed for masonry or cementitious surfaces, although these may be suitable for other tests.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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