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

Comments on old and recent experiments of "stickiness" of a soft solid to a rough hard surface