​Provides for grading and classification, using the FEPA system, of screen grits 12 to 220 for coated abrasives, 'P' series microgrits for coated abrasives, grits 8 to 220 for bonded abrasives, and 'F' series microgrits for bonded abrasives. Appendices deal with method for abrasive grain recovery from surface coated abrasives, sources of equipment, and sampling by quartering.