ModelBB-75TheModelBB-75Testerwasdevelopedtoanswertheneedofcertainindustriesforamethodofrapidlytestingthehardnessofelectro-depositedcopperinthelowhardnessrange.TheB-75penetratorisusedtogivesensitivity,andtheModelBloadspringisemployedtogivelightpressures.Thiscombinationallowstheusertotestthesoftrangeofmanycommonmaterials.ThegraphbelowshowstherangecoveredbytheModelBB-75testeroncopper.