Silicon Carbide is nominally the hardest abrasive, friable when used on ceramic, glass, and metal, but not friable on wood. Sometimes it is coated with Zinc Stearate to reduce clogging. This is one of the "workhorse" abrasives in today's technology. It is often used in it's natural brown color, available in 24 to 400 grit. It is friable, thus self-sharpening, nominally making it last a long time. In the past this was used in wet-or-dry applications.Īluminum Oxide is next on the hardness scale. My recent research, checking facts for this page, suggests that it wears fast but is not friable.Įmery is next on the hardness scale, typically black, often cloth backed, and often used in metal working (and plumbing). I thought it's advantage was that it is friable - the grains break and give a new sharp edge as the paper wears. Not only has it become far less common than years ago, but maybe it has become obsolete. As I wrote this, I realized I hadn't seen any Garnet paper for sale recently, and as I raided my drawer of sandpaper, I couldn't find any. Garnet is a traditional abrasive used to get a fine finish on wood - not for rough sanding. The generally hated process of sanding can be made easier by some machines and tools, described in the web page on sanding, but the performance of those tools (or the hand sanding done without the tools) is greatly impacted by the use of the proper abrasive. We receive a small commission if you click on the ads (selected by Google), or if you link to a product recommended by us. One-person business of woodworking and other crafts SoloWoodworker - Abrasives used for sanding wood and wood finishes
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