![]() ![]() It is advantageous to use MICRO-MESH as soon as possible in your finishing process as it gives a more consistent scratch pattern and therefore a better. We charted five grit standards using micron grit sizes from 4125, down to 0.3, and added Shapton stones, ceramic stones, water stones, diamond stones, oil stones and specialized sheet abrasives to create a table of relative fineness. Use conventional abrasives as normal prior to going into the MICRO-MESH stage. Alternatively, keep reading to see all the details you need for a successful DIY project. Use this CONVERSION CHART as a guide to know when you can start using MICRO- MESH. The International Gem Societyhas great information on Microns, Grits, and Mesh, if you’d like further research. This toolkit features measurement and conversion charts to aid you in identifying correct particle measurements, help with shape conversions, and define the properties of particles and shapes to ensure you select the best product for your applications. Some of the grits described in the chart below are not commonly available in gem cutting abrasives for various reasons. Lower numbers designate coarser or larger grits ( 24- or 40-grit) Higher numbers indicate to finer grits (600- or 1,000-grit) The grit is often indicated on the packaging or at the back of the sandpaper sheet. Lower grit numbers represent coarser abrasives that scrape off materials much quicker. The higher grit number is equivalent to a finer abrasive, which creates smoother surface finishes. Dieter Schmid Fine Tools has a conversion chart for other countries: the Federation of European Producers of Abrasives standards ( FEPA P – for sandpapers) ( FEPA F – for sharpening stones and wheels) and the JIS, Japanese Industrial Standard – English version. The grit of sandpapers is a rating of the size of abrasive materials on the sandpaper. ![]() This chart is based on 3M’s PDF and the ANSI chart for US standards: American National Standards Institute (see the bottom of the page). Sandpaper Grit Chart Average Micron Size (in inches) CAMI GRIT RANGE FEPA P GRADE AKA COMMON USES 0.02886 - 0. SANDPAPER GRIT COMPARISON P-SCALE FEPA US STD CAMI MICRON MICRO MESH AbrasivePads 50 351 P50 326 60 268 P60 260 P80 197 80 192 P100 156 100 141 P120 127 120 116 P150 97 150 93 LT Gray/Green P180 180 78 LT Gray/Green 220 66 P220 65 Maroon P240 58.56 Maroon P280 240 52.5 Maroon P320 46. ![]()
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