pen-turners
Member
Hey all,
My dad picked up a bunch of sandpaper at a flea market and I have never seen this stuff before. They are almost clear and are 3M Imperial Microfinishing films. They have a marking of 273L 5 Mil NO5 and 60u. Does anyone know what these markings are??? I also have some that appear to be aluminum oxide and are marked 3M 273L 5 Mil TC1 and 40u. Is there somewhere to find a conversion for grits???? Let me know if you can help.
Chris
My dad picked up a bunch of sandpaper at a flea market and I have never seen this stuff before. They are almost clear and are 3M Imperial Microfinishing films. They have a marking of 273L 5 Mil NO5 and 60u. Does anyone know what these markings are??? I also have some that appear to be aluminum oxide and are marked 3M 273L 5 Mil TC1 and 40u. Is there somewhere to find a conversion for grits???? Let me know if you can help.
Chris