Abstract: The invention relates to a process and to a device for the determination of the adhesion tendency of cotton by using cotton samples, whereby the sample taken from the material to be tested is opened down to the individual fiber as in the spinning process, and the fibers thus obtained are deposited on a testing surface under the influence of a certain centrifugal force in the form of a fiber ring. Following complete feeding of the sample, the deposited fiber ring is removed and the quantity of the fibers remaining caught on the testing surface is counted.