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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 carry away particles that would otherwise clog the grit. Its first application was in automotive paint refinishing. [6]
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.
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. If someone has access to a reference for these abrasives, please add them to the table.
3M Company (originally the ... abrasives, laminates, passive fire protection, personal ... 3M obtained its first patent in 1924 and acquires approximately 3,000 new ...
Many auto insurance companies offer discounts up to 10% for completing an approved safety course, especially for drivers over 55. Consider usage-based insurance .
A wheel machine is a high-power, high-efficiency blasting operation with recyclable abrasive (typically steel or stainless-steel shot, cut wire, grit, or similarly sized pellets). Specialized wheel blast machines propel plastic abrasive in a cryogenic chamber and is usually used for deflashing plastic and rubber components.