ABSTRACT
Generally, the accuracy of contact angle measurement is not limited by the experimental technique, but by the reproducibility of the surfaces investigated. Instruments that measure to an accuracy of 1° are usually more than adequate [1]. Usually, there is good agreement among the results obtained by various methods if appropriate precautions are taken. The methods described here are for liquids on solids in air. Most of these can also be used, with slight modifications, for liquids on solids immersed in other liquids.
