Abstract
ABSTRACTA simplification of the Bingham Plastometer, applicable to enamel slips, is described and the theory of plasticity discussed briefly.It was found that increase in temperature or increase in water content of enamel'slips raised the mobility without greatly affecting the yield value. Addition of clay and of certain inorganic salts raised the yield value without changing the mobility. Sodium silicate reduced the yield value to zero and lowered the mobility.
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