Abstract
Measurement of particle size in the test of distribution particle sizes in powder by the sedimentation method, is often attended with difficulty by reason of coarse particles and of powder with high sedimentation velocity, therefore with high specific gravity.
In order to cope with such a drawback it has been a common practice to carry out the measurement in the optimum conditions fittest for the instrument employed for controlling sedimentation velocity with high viscosity medium. This, however, would entail a number of problems concerning the dispersion of samples.
The experiment described below shows the characteristics of the Shimadzu Recording Sedimeter based on the specific gravity balance method, together with the experimental results showing the influence of high viscosity in the medium on the particle size distribution.
