This standard should be used for coatings designed for spray applications of objects in the factory or in the field. It is particularly important to use in the evaluation of metallic coatings for appearance properties such as gloss and colour.
Five applications are given for the preparation of films with uniform coating thickness on test panels. These applications are:
Values stated in SI units should be accepted as standard.
This standard does not purport to address all, if any, safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.
ASTM D823 Test Practice
A liquid material is applied to a test panel by means of an automatic spray machine consisting of a mounted spray gun and a panel holder. Move this machine panel holder with the test panel at a uniform speed through the atomized spray produced by a fixed spray gun, or move the gun with atomizing spray at a uniform speed beyond the test panel mounted on a fixed panel holder. A machine equipped with a programmable system can vertically index the spray gun for multiple coats with multiple passes and selective time delay.
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