CHARACTERIZATION OF TALC SAMPLES FROM DIFFERENT SOURCES

Nine different kinds of U.S.P. grade talc Samples were examined for va riations in density, particle size, surface area, tendency of preferre d orientation, and maximum ejection force. It was found that U.S.P. gr ade talcs varied in physical properties. The relationships between var ious physical properties of talc were analyzed using the Pearson's cor relation of coefficient. The results suggested that the talc sample wi th a higher tendency of preferred orientation has closer bulk packing and talc with lower bulk density and higher surface area requires less peak force to break the tablet/die-wall adhesion.