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A study of the weather resistance of porcelain enamels has been under way at the National Bureau of Standards since 1939. A total of 768 1-ft-square panels are being exposed at four locations selected to represent temperate residential, temperate industrial, temperate salt-air, and semitropical residential. The results so far obtained show that most enamels are highly resistant to deterioration under the conditions existing at selected locations and, further, that those enamels that are not resistant can be eliminated prior to installation by simple laboratory tests. The results obtained from an inspection made after 7 years of exposure are given in the present paper.
Moore, Dwight G.
Ceramic Engineer, National Bureau of Standards, Washington, D. C.,