IS 7297 (1974): Olivine sand and flour for use in steel …
Tables 1 and 2 ). 8. GRAIN FINENESS 8.1 The grain fineness of various grades of olivine, when tested on a 100-g sample, shall conform to the requirements given in Tables 1 and 2. 8.2 The grain fineness of olivine sand shall be determined in accordance with the method given in IS : 1918-1966*.