  The old asperity model of Fuller and Tabor had demonstrated almost 50 years
ago surprisingly good correlation with respect to quite a few experiments on
the pull-off decay due to roughness of rubber spheres against roughened Perspex
plates. We revisit here some features of the Fuller and Tabor model in view of
the more recent theories and experiments, finding good correlation can be
obtained only at intermediate resolutions, as perhaps in stylus profilometers.
In general we confirm the predictions of the Persson & Tosatti and Bearing Area
Model of Ciavarella, as stickiness depends largely on the long wavelength
content of roughness, and not the fine features. Therefore, multi-instruments
measurements should hopefully not be needed.
