Laboratory-scale measurements were made of the mass-transfer efficiency of a gauze-type distillation column packing. The test mixture, chlorobenzene/ethylbenzene, was used, and several operating pressures in the range 40-750 mmHg were studied. It was found that the HETP data were correlated well by available models developed for commercial-scale structured packings. The final result of the work is a procedure that enables tests at 25-mm column diameter size to be used for predicting performance of a large-scale system utilizing structured packing, gauze, or sheet metal.