Designed to determine paint drying time by linear recording, with up to 10 test positions. Ten rods with hemispherical tips, fitted to a carriage, are brought into contact with the fresh film from one end of the test piece and moved lengthwise on the samples. The drying time is calculated from the distance travelled, measured using a graduated rule along the edge, corresponding to the various stages observed on the trace.

The coatings are applied beforehand on glass strips 25mm (0.98") wide and 70cm (27.5") long. Using the Elcometer 3505 Cube Film Applicator it is possible to apply up to five products simultaneously on a glass plate.