RA33 Colorfastness to Atmospheric Contaminant Test Methods

Scope: To study the factors in atmospheric exposure, other than photochemical influences, which cause color changes; to develop test methods for measuring color changes that will reliably correlate with end use. Contaminants under study include oxides of nitrogen, ozone, sulfur dioxide and products of hydrocarbon combustion. Test Methods 23, 109, 129, 164.