1922 29 Dec. 747 Edward Longstreth medals were presented..to Dr. A. H. Pfund..for his cryptometer, paint film gauge, colorimeter and rotating sector.
1939 3 Mar. 14/2 A previous method was the examination of a small section at the edge of the paint film with a microscope.
1993 (new ed.) ii. 87/1 Ferrous metals that are rusty will shed practically any paint film rapidly.