 The composite particles produced were evaluated for their powder and compression properties . Although an increase in the microcrystalline cellulose proportion imparted greater compressibility of the composite particles , the shape of the particles was typically less spherical with rougher surface resulting in a decrease in the degree of flowability . Compressibility of composite particles made from different size fractions of microcrystalline cellulose was not different ; however , using MCJ , which had a particle size range close to the size of RS ( D00 = 00 . 00 microm ) , provided more spherical particles than using MCS . 