1973 年 93 巻 9 号 p. 1112-1115
Effect of calcium stearate content on the compacting phenomenon of pharmaceutical powders in the course of mixing with calcium stearate was examined. Changes in apparent density of the powders were not only influenced by calcium stearate content, but they varied with cumulative revolution number of the V-type mixer under all calcium stearate content. The patterns of these changes were similar among the same kind of powders, even if particle size was different. The most effective content of calcium stearate to specific surface area of powders from the view-point of increasing apparent density of pharmaceutical powders was considered to be constant for each pharmaceutic.