100-grit (CAMI) sandpaper corresponds closely to (FEPA) P-100 or P-120. 80-grit (CAMI) sandpaper corresponds closely to (FEPA) P-80 or F-100. 40-grit (CAMI) sandpaper corresponds closely to (FEPA) P-36 or P-40. FEPA sizes are not an identical match to CAMI sizes, but you can get something very close by selecting one of the two closest FEPA numbers. While there are too many grit gradations to list, if you’re buying FEPA-sized sandpaper, the following commonly used CAMI sizes will give you an idea of the corresponding FEPA sizes. Grit sized with the FEPA scale is indicated by the letter “P” preceding the grit number. Most sandpaper you buy at DIY centers and lumberyards will bear the CAMI scale, but if you order sandpaper online, you may run across sandpaper grit sized by the Federation of European Producers of Abrasives (FEPA). The small grains on the sandpaper measure approximately 141 microns in size, which is equivalent to. 
On the CAMI scale, sandpaper grit is measured in microns, and to get an idea of how small a micron is, check out a piece of 100-grit sandpaper.
And, conversely, lower numbers indicate larger grains and overall coarser sandpaper. The higher the number, the smaller the grains and the finer the sandpaper grit. When shopping for sandpaper, you’ll see numbers such as 80-grit, 100-grit, or 200-grit. In the United States, grit is determined based on a gradation scale established by the Coated Abrasive Manufacturers Institute (CAMI). RELATED: 9 Clever Alternative Uses for Sandpaperĭistinguishing sandpaper grit sizes is important because not every project requires the same. The particles (also known as grains or grit) are sifted through screens and sorted by size before being bonded with adhesive to a paper, sponge, or cloth-type backing to create an abrasive material that’s handy in a number of do-it-yourself situations. Sandpaper isn’t made of sand, of course, but rather it consists of fine particles from either natural or synthetic sources. SANDPAPER 800 GRIT PRO
Finding the right tool for the easiest effort.Īfter you have a few completed projects under your belt, you’ll be an old pro at picking just the right sandpaper. Considering the best type of grit to choose, and. Choosing the appropriate coarseness for the project,. 
Selecting the right size of sandpaper grit,. Warm up with these basic recommendations and rules of thumb. Which did this project call for again?ĭifferent sandpaper grits perform very different jobs, and selecting the right grit can be confusing when you’re starting out. Seeing sandpaper on a tools and materials list may seem easy enough to check off-until you hit the hardware store and face stacks of sheets and booklets, each distinctly identified with a different set of numbers, or sandpaper grits. If you’ve ever worked with wood, you’re likely familiar with instructions to sand all edges after cutting: before applying a finish, between coats of paint, and so on.
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