Sandpaper

[Bill]

80 grit Aluminum Oxide (abrasive) sandpaper versus Silicon Carbide (abrasive) sandpaper.

What is the practical difference, from the point of view of sharpening chisels, say? Any? I noticed a feller on the Woodsmith shop used Aluminum Oxide before he went to Silicon Carbinde on the finer grits.

Thank you, Bill

[J. Clarke]

The practical difference is that it's hard to find anything but aluminum oxide in coarse grits and anything but silicon carbide in fine grits.