Accelerated weathering, its use for routine testing of paints.
This is a 1930 technical report by H.A. Nelson and F.C. Schmutz, published by the New Jersey Zinc Company, on accelerated weathering apparatus for routine testing of paints and zinc pigments. The photographs show a cylindrical test chamber with a rotating fan, a central spray nozzle, and a schematic of gas inlets for sulphur dioxide, carbon dioxide and air, giving designers a plain engineering view of mid-century laboratory equipment with its dimension callouts and labelled parts.
