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When Drew joined 3M in St. Paul, Minnesota in 1921, it was a modest manufacturer of sandpaper.While testing their new Wetordry sandpaper at auto shops, Drew was intrigued to learn that the two-tone auto paintjobs so popular in the Roaring Twenties were difficult to manage at the border between the two colors.
Cheap sandpaper was often passed off as glass paper; Stalker and Parker cautioned against it in A Treatise of Japaning and Varnishing published in 1688. [5] In 1921, 3M invented a sandpaper with silicon carbide grit and a waterproof adhesive and backing, known as Wet and dry. This allowed use with water, which would serve as a lubricant to ...
Searching the internet, I am having difficulty locating grit size information for ultrafine microgrit papers beyond CAMI 1000. Papers in grades 2000, 3000, 5000, 8000, 10000 and 12000 can be found, but size information for the grit particles of these grades seems nonexistent.
The CAEv2 was a double ended earplug that 3M claimed would offer users different levels of protection. [104] Between 2003 and 2015, these earplugs were standard issue to members of the U.S. military. [ 105 ] 3M acquired Aearo Technologies in 2008.
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President-elect Trump has assembled his Cabinet, and senior staff positions are filling up for his second term in the White House before taking office in January. Trump has nominated leaders for ...
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