A description is given of experiments carried out to determine the effect of liquid-phase rheology on the extrusion behaviour of particulate pastes. These were prepared by mixing alumina powder with chosen amounts of four liquids. Measurements show that the properties of the pastes are directly related to those of the liquids from which they were made. Rheological properties of the pastes and the liquid phases are related by factors which are independent of liquid type, liquid content and extrusion rate. An additional set of experiments used pastes made from ballotini particles and one of the liquids.