A lubricant for the lubrication of extrusions, preferably strips 4, 4a, made of a biopolymeric substance, in particular of gelatin, in a work process and a method of manufacturing soft gelatin capsules, wherein the lubricant is water-soluble and contains one or more polyglycerols having 2-28 monomeric units, preferably 2-10 monomeric units. Associated control functions are described. The casting system can comprise an electroslag refining system; a nucleated casting system; and a cooling system that cools the metal casting so as to cool a liquidus portion of the metal casting. , provided as instructions for operating in a host computer system for converting a provided virtual processor model to a user virtual processor model. If the above-mentioned operation is required, an appropriate fixing command is issued. The voice coil is wounded on the bobbin.