1. Scope

1.1 This practice covers techniques to accelerate weathering effects of factory-coated embossed hardboard using apparatus described in Practice G90.

1.2 This practice is based upon Procedure B, Cycle 1 of Practice G90 (concentrated natural sunlight with periodic surface water spray) plus a soak-freeze-thaw cycle (see 8.2 of this practice).

1.3 Testing by use of the methods described in this practice may be employed in the qualitative assessment of weathering effects. The relative durability of coated hardboards may be best determined by comparison of their test results with those of pass-fail control specimens derived from real time exposure test experience (see Section 5 for specific guidelines).

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

1.5 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D660 Test Method for Evaluating Degree of Checking of Exterior Paints

D661 Test Method for Evaluating Degree of Cracking of Exterior Paints

D662 Test Method for Evaluating Degree of Erosion of Exterior Paints

D772 Test Method for Evaluating Degree of Flaking (Scaling) of Exterior Paints

D4214 Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films

G90 Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight

G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

G169 Guide for Application of Basic Statistical Methods to Weathering Tests

Keywords

accelerated weathering; factory coatings (hardboard); film integrity; hardboard (composition board siding); Accelerated aging/testing--paints/related coatings; Film--paints/related coatings/materials; Factory-applied coatings; Film integrity; Hardboard; Outdoor weathering; Soak-freeze-thaw procedure; Sunlight/monochromatic light exposure

ICS Code

ICS Number Code 79.060.20 (Fibre and particle boards)

DOI: 10.1520/D5722-95

ASTM International is a member of CrossRef.