Emery cloth differs to sandpaper in several ways:
Emery cloth has the abrasive glued to a cloth rather than paper, which makes it far sturdier and less inclined to tear in use
Emery cloth uses a form of corundum (or corundite) as the abrasive, rather than sand
Emery is longer lasting than sand as a glued abrasive
Emery particles are of a more consistent size than sand, especially where finer grades are concerned
Emery should not be used on wooden surfaces as fine particles of iron and other metals can become embedded and cause staining or other damage to the wood
Emery cloth is typically graded into "grit" sizes between 8 and 120, with the grit becoming coarser as the number increases. 80 grit paper is typically used for roughing and chamfering plastic pipe.
