THE EFFECT OF MECHANICAL PRESSURE ON THE IMBIBITIONAL AND DRYING PROPERTIES OF SOME CERAMIC CLAYS,II*

The apparatus and technique used in a study of the permeable-pressing characteristics of ceramic clays, described in a previous paper with the same title, were used in making a detailed study of the effect of molding pressure on the properties of permeablepressed disks of Florida and Delaware kaolins, The effect of initially high preswres on the properties of disks made at low pressures was investigated, and the rate of water removal was studied. The permeable-pressing characteristics of mixtures of clays and nonplastics were investigated at high and low pressures and the firing properties of permeable-pressed clay disks made in the previous investigation were determined. Further work with larger disks is in progress.