The ZC Powder Disperser incorporates and disperses extremely difficult-to-wet powders into a liquid stream in a single pass. The design of the disperser's rotor/stator provides for intense shearing of powders prior to hydration, to produce homogenous dispersions that are completely free of lumps and "fish-eyes." A near perfect vacuum permits concentrations of up to 25% by weight to be generated with minimal air entrainment. Because the powder is completely hydrated, yield is maximized and over-processing/wastage are eliminated compared to other in-line high shear and in-tank technologies. Quadro US Inc. 55 Bleeker St. Millburn, NJ, 07041-1414