Abstract: The extrusion of a green body from a paste or suspension of particulate solids in a liquid is conducted by a process which includes the steps of introducing flowable paste or suspension into an inlet end of a moulding passage which is defined by walls having at least one partially liquid-permeable wall section; applying pressure to the paste or suspension, thereby to remove from the passage at least a major portion of the liquid of the paste or suspension, by establishing a pressure differential across the liquid permeable section, so as to form in the passage a non-flowable body of consolidated particulate solids of the paste or suspension, and to extrude the non-flowable body progressively from an outlet end of the passage.