This standard describes a test method for accelerated exposure of coatings using unfiltrated open flame carbon arcs. This test is used to evaluate the performance degradation of coatings under the influence of light, heat and moisture, but does not simulate local weather phenomena. The test requires the use of specific carbon arc configurations and emphasizes the repeatability of results and the validity of inter-laboratory comparisons. The standard includes guidance on sample preparation, selection of test conditions, and evaluation of results.