FEPA P-grade · Converted
P280 in CAMI grit and microns.
P280 paper averages about 52.2 µm on the FEPA table. On the US CAMI scale that is about CAMI 240.
- Avg. particle
- ~52.2 µm
- FEPA table
- Nearest CAMI
- 240
- by particle size
- Plain "280"
- n/a
- no CAMI 280 published
- 3M Trizact
- ·
- no A-grade paired by 3M
What P280 is for
Light scuffing between coats.
Either side of P280
The neighborhood.
Questions people ask
What is P280 in CAMI grit?
About 240. P280 averages 52.2 microns on the FEPA table and CAMI 240 averages 53, so the scratch is close to the same.
How many microns is P280 sandpaper?
About 52.2 microns average particle diameter, per the FEPA P-grade table (ISO 6344).
Convert any other grade, from CAMI, microns or a Trizact A-number, on the grit converter.
Sizes are average particle diameters from the published FEPA (ISO 6344) and CAMI (ANSI B74.12/B74.18) tables. "Nearest" means within 10%; otherwise both neighbors are shown. Trizact pairings are 3M's own. Sources: Wikipedia, "Sandpaper" grit table (rev. 1127917881); Klingspor coated abrasives grit chart.