Abstract: Soap bars having indicia extending between, and visible on opposing major faces, and process and apparatus for producing same, is disclosed. The indicia forming material is preferably a soap material having physical and chemical characteristics, except for coloration, similar to those of the base soap material making up the soap bar. The indicia material is extruded through indicia forming dies into the base soap mass immediately prior to the plodder nozzle which rough forms the final soap bar.

Abstract: Apparatus for making striped or variegated soap wherein soap of one predominant color is plodded and extruded as a continuous billet of predetermined cross section with fluid of another predominant color being injected into the soap stream through pressure responsive valves in downstream oriented fixed nozzles after it leaves the plodder worm and prior to extrusion.

Abstract: Variegated detergent bars are made by mixing together pieces of soaps of contrasting colors in a vacuum zone and plodding the mixture in such manner as to fuse the different soaps together but maintain colors separate, thereby producing a desired pattern therein, preferably resembling marble. The pattern is controllable by variations of the proportions of material charged, plasticities thereof, speeds of the worms, design of the compression-extrusion head and preferably, by extruding the soaps through small openings in a plate after the final plodder worm, cutting the extrudates and imparting transverse or radial motions to them before final extrusion.Also described are plodding and extruding apparatuses utilized to practice the variegating process.