Abstract: A flexible tubular sleeve for use in conjunction with a source of heat for the application of a treating composition to the hair, said sleeve comprising an inner layer of a liquid impermeable material and an outer reservoir layer, said reservoir layer being impregnated with a hair treating composition having a melting point of about 22.degree.-100.degree. C.

Abstract: A photo-integrated densitometer is arranged to evaluate the relative oiliness and stringiness of hair tresses under dynamic conditions.

Abstract: An apparatus for measuring the incremental grooming force experienced by a hair tress during combing, and supplying an instantaneous readout of that force. The apparatus includes a comb or brush with strain gages attached to it which change resistance when mechanically deformed. The change in resistance is electrically measured to provide an indication of incremental grooming force. A continuous monitor is connected to the resulting electrical signal to provide an instantaneous indication of incremental grooming force. A method for using the apparatus to reduce the creation of split ends during hair grooming is also provided.