This theoretical paper examines the expected shape of the sizedistribution curves of comminuted porousmaterials. A transitional region is predicted in the sizedistribution of the fragments from porousmaterials called the ‘oops’ region. Also predicted is a change in fragment shape before and after the particle size passes through the sizeregion of the voids—the Swiss cheese effect. The problem of void liberation and characterizing or measuring void volumes is discussed.
