Investment caster Acra Cast, Bay City, Mich., has invested in a new spectrometer and grown its employment numbers almost back to their pre-recession levels, according to a company executive. Richard Singer, Acra Cast’s president and owner, said the company has spent $70,000 on improving its laboratory testing facilities and now employs 18, up from a low of 11. “We’re on the incline again, which is positive…