supply of dolomite powder , item description , white supply of dolomite powder packed in bags , as per following specifications:- ( i ) it shall be light in colour ( ii ) it shall not contain combustable materials . ( iii ) it shall not contain more than 5% free silica ( iv ) the dust shall be of such fineness that the dust which passes through 60 mesh sieve not less than 50% by weight and not more than 75% by weicht shall pass through 240 mesh sieve . ( v ) it shall be readily dispersable in to air . ( vi ) it shall not cake in general humid atmosphere note : the bidders are required to submit undertaking along-with their offer to submit certificte from any govt /apporoved lab for the above specifications mentioned at sl . no . ( i ) to ( vi ) alongwith supply of materials .