ISO 6344
ISO 6344 is an international standard covering the materials sizes and tests regarding sandpaper and other similar coated abrasives.
It has three parts:
- ISO 6344-1:1998: Coated abrasives, sizes and tests.
- ISO 6344-2:1998: Macrogrit, P12 to P220
- ISO 6344-3:1998: Microgrit, P240 to P2500