Food machinery lubricant

What is the difference between NSF H1 and 3H? What is NSF certification? NSF categorizes food grade lubricants into H1, H2, and H3, with H1 being suitable for "accidental contact" between lubricants and food or beverages. It can be used as a protective rust proof film, gasket, or sealing agent for food processing equipment, or as a lubricant for mechanical parts and equipment in areas where it may come into contact with food. Why should I use lubricants with H-1 certification? According to different exposure risks, equipment such as baking ovens, conveyors, and mixers are required to use H1