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HEPA type bags and filters will trap the carbon dust.Same with toner.The carbon dust and toner are mildly electrically conductive so they could cause problems if those got into motors or other electrical parts of a vacuum.And I would not be breathing the carbon dust.Remember reading an article from long ago when carbon blocks were used as a moderator in the first nuclear reactor.The blocks were cut to size on a table saw with no dust collection.The workers got respitory issues from the dust.