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Guest posted a topic in Clay and Glaze ChemistryI have mentioned this very important 2016 article (from Ceramics Monthly magazine) many times here on the forum when the subject of studio dust and cleaning and respirators comes up. The full article is now online via the DOCTOR's personal website. This is MUST READ stuff if you are working with clay. Particularly in a "home studio" situation. Yes, it is a single study, and of course that alone has its limitations on how you can extend the validity of the data accumulated. But it was done well, and by a credible professional in the field (environmental epidemiologist and professor at McGill University and avocational potter). Right after it came out I had conversations directly with the author, since it is my professional duty to keep up with this stuff since I teach it at the college level. Both of us were concerned with what it appears to show. It "blows away" a lot of assumptions about dust generation in the studio and appropriate controls. Note the highest spike on the graph. It is from "sculpting leatherhard clay". An activity we all assume is not a high dust producing activity. (This study deserves WAY more research!) http://markgoldbergpottery.com/goldberg_studiodust-final.pdf best, ..........................john addendum edit: the link in the above post seems to have expired, article by the same author, Mark Goldberg, here. - Min