Idbill Posted November 24, 2012 Report Share Posted November 24, 2012 I have a bunch of wet/dry sandpaper in varying grits. At some point I organized it by number, but found that my P600 is more coarse than my 400b. Does anyone know what the P vs b indicates? Quote Link to comment Share on other sites More sharing options...
jhl.verona Posted November 24, 2012 Report Share Posted November 24, 2012 There are two popular standards for sandpaper, the American CAMI and the European ISO (prefixed with a P). Wikipedia provides a comparison table. Basically from 60 to 220 we're talking the same language, but from there on you always need a higher P value to match the CAMI. So, yes P600 is about equivalent to a hypothetical 380 grit. Chris Schwarz has also published a chart for all types of grits, sandpaper and honing stones. John Quote Link to comment Share on other sites More sharing options...
Keggers Posted November 25, 2012 Report Share Posted November 25, 2012 You might find Marc's video on sanding and sandpaper helpful. Quote Link to comment Share on other sites More sharing options...
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