STONES FOR COPPER CYLINDERS Grit No. Order No. Surface Finish Ra Primary Application Perform- ance C120 321-0012 1.08µm/42.51µin Rough Grinding of Copper or Steel Faster Cutting GC320S 321-2032 0.80µm/31.49µin Removal of Tool Marks on Copper Faster Cutting C400 321-0040 0.64µm/25.19µin Removal of Tool Marks on Copper Faster Cutting C400B 321-0041 0.28µm/11.02µin Removal of Tool Marks on Copper Longer Lasting C600 321-0060 0.51µm/20.07µin Sizing of Copper Faster Cutting C600D 321-0063 0.21µm/8.26µin Sizing of Copper Longer Lasting C800 321-0080 0.41µm/16.14µin Medium Finishing of Copper Faster Cutting C1000 321-0100 0.28µm/11.02µin Medium Finishing of Copper Faster Cutting C1500 321-0150 0.18µm/7.08µin Medium Finishing of Copper Faster Cutting C1500D 321-0153 0.10µm/3.93µin Medium Finishing of Copper Longer Lasting C2000 321-0200 0.13µm/5.11µin Fine Finishing of Copper Faster Cutting C3000G 321-0300 0.09µm/3.54µin Fine Finishing for Semi-Dull Appearance on Helio or Ohio Cylinders Faster Cutting C3000B 321-0301 0.05µm/1.96µin Fine Finishing for Dull Appearance on Textile Cylinders Faster Cutting C3000D 321-0303 0.05µm/1.96µin Fine Finishing for Semi-Mirror Appearance on Publication Cylinders Longer Lasting GC3000 321-2300 0.05µm/1.96µin Mirror Finishing of Packaging Cylinders Longer Lasting C3000P 321-0315 0.05µm/1.96µin Fine Finishing on Graphicart Machine (7.75" O.D. X 2" I.D. X 3.35" Thick) Faster Cutting C3000S 321-0318 0.05µm/1.96µin Replacement for Standard Process F1000 Stone Faster Cutting GC3000S 321-2318 0.04µm/1.57µin Softer Version of GC3000 Stone, for Mirror Finishing Faster Cutting GC4000S 321-2418 0.03µm/1.18µin Super Mirror Finishing of Packaging Cylinders for Water Based Inks Faster Cutting