Posted by Bernie Feltman on September 19, 2009  That is a very nice photo. The combination of the lens and the kaolin dust flying off the cars is simply electric!! Nice job, Bob Posted by EL ROCO Photography on September 20, 2009  That is a neat photo, but you might want to keep your exposure to that dust to a minimum. Seems Kaolin causes Kaolinosis (Pneumoconiosis from Exposure to Kaolin Dust). For those that don't know, Kaolin (CAS 1332-​58-​7) is a clay mineral that mainly con­sists of kaoli­n­ite, a non-​fi­brous alu­mi­nosil­i­cate with small quan­ti­ties of other min­er­als, such as quartz, mica and TiO2.

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