ABSTRACT
Many of us have experienced the difculty of catching a wet soap bar at the bottom of a wet bath tub. The cause of the slippery soap bar is the formation of lamellar liquid crystalline phases between the soap bar and the surface of the bathtub. The structure of a lamellar liquid crystalline phase is similar to that of graphite, in the sense that the binding between the lamellae is weak compared with the lateral binding in the lamellae. The sliding movement is, therefore, expected to occur between the layers [1, 2].
