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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.
3M launched "Press 'n Peel" a sticky bookmark page holder in stores in four cities in 1977, but the results were disappointing. [36] [37] A year later 3M instead issued free samples of it as a sticky note directly to consumers in Boise, Idaho, with 95% of those who tried them indicating they would buy the product. [36]
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Tabletop drum sander: A bench-top sander that uses a rotating drum. Much like a jointer, the operator adjusts the height of the grit, by changing the grit of sandpaper, to adjust the depth of cut. Wood is hand fed against the drum to achieve a flat, smooth surface. Can be used for surface sanding, edge sanding, stripping paint, cabinet doors, etc.
Sand dunes are a consequence of dry conditions or wind deposition. The Sahara Desert is very dry because of its geographic location and proximity to the equator. It is known for its vast sand dunes, which exist mainly due to a lack of vegetation and water.