(1) Laboratory test The particle size of the ore sample is generally 50-0mm or 100-0mm. (2) The particle size of semi-industrial and industrial test ore samples shall be determined according to the requirements of the beneficiation method, process flow and test equipment. (3) The specimen size of the sample and the work index determined by rock ore identification shall be requested by the test unit. bucket injection mold,blow mold vs injection mold,benchtop injection mold,at home injection mold Global Injection Molds Co., LTD , https://www.globalinjectionmolds.com