- This unification indicates the procedure for determining the particle size distribution in molding materials, to highlight the percentage distributions of the particles that constitute them distributed according to certain size intervals, by means of pre-established control sieves .
UNI 4269-1959 history
1959UNI 4269-1959 Plastic material testing. Thermohard materials*. Determination of particle size distribution of stamping materials, replacing UNI 3630