Grinding Stone Powder Until 5 Micron

4,000 grit - Blue, equivalent to 5 micron 12,000 grit - Grey, equivalent to 2 micron ... Wet grinding work on all glass, stone, ceramic, shell and bone ... yellow, then 3 micron green and so on until the desired finish is achieved. For glass engraving, use the diamond paste for the final stages of polishing, applying a tiny amount to a ...


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