Over 20 years after Kokichi Mikimoto succeeded in cultivating the world's first cultured pearl, then he established his first Black South Sea pearl farm in 1914, thereby revolutionizing the pearl industry forever.
This work included production of doors and window frames; hence exposure to oak dust was likely. Overall evaluation. Carpentry and joinery entail exposures that are possibly carcinogenic to humans (Group 2B) . For definition of the italicized terms, see Preamble Evaluation.his work included production of doors and window frames; hence exposure to oak dust was likely. Overall evaluation. Carpentry and joinery entail exposures that are possibly carcinogenic to humans (Group 2B) . For definition of the italicized terms, see Preamble Evaluation.
Inorganic lead compounds are Group 2A - Probably carcinogenic to humans. American Conference for Governmental Industrial Hygienists (ACGIH): A3 - Confirmed animal carcinogen. Teratogenicity / Embryotoxicity: DEVELOPMENTAL HAZARD. May harm the unborn child. Known to cause: learning disabilities, effects on behaviour.