Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 10/Sec 1) (First Revision) which is identical with ISO 13320 : 2020 ‘Particle size analysis - Laser diffraction methods’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Paints, Varnishes and Related Products Sectional Committee and approval of the Chemical Division Council.

While adopting ISO standards on different test methods, it was observed that there was no Indian standard on particle size analysis in the field of surface coatings. Particle size played important role in surface coating and directly concerned with various characteristics and performance of corrosion resistant coating. Considering the importance of laser diffraction analysis, also known as laser diffraction spectroscopy, which is a technology that utilizes diffraction patterns of a laser beam passed through any object ranging from nanometers to millimeters in size to quickly measure geometrical dimensions of a particle, the Committee felt that it would be more convenient to prepare this standard method by adoption of ISO 13320 : 2009 on dual number basis. This process does not depend on volumetric flow rate, the amount of particles that passes through a surface over time.