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To simulate the formation of a condensate on the inside surface of clear glass when interior trim materials are exposed to an external source of radiant energy. To provide a method of measuring the effect of condensate formation on light transmittance.

1.1 This recommended practice describes two methods for determining the tendency of interior materials used in automobiles and other vehicles to (a) produce a light scattering deposit (fog) on a glass surface, or (b) produce a measurable deposit (mass) on aluminum foil. 1.2 This document is applicable to the measurement of a fog condensate on glass or aluminum foil surfaces within the limits of the test conditions. 1.3 It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to its use.