THE WATER SMOKING OF CLAYS1

Experimental Method. —The water smoking behaviors of two plastic brick clays, one shale and one fire-clay were studied by heating 4-in. cubes at different rates, two thermo-elements being buried in the brick and two others placed against the exterior surface. Results of Conclusions. —To save time in water smoking, the ware should be previously dried not far from 100°C, good circulation should be provided in the kiln and the temp. of the interior of the product should not lag appreciably behind that of the kiln. It should be possible to water smoke heavy clay products in 15 hours with heating rate of 20°C per hour.