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Discussion Starter #1
whats the difference in a stone's "grit" rating vs. sandpaper

please correct if grit is incorrect terminology

i have a stone marked 600 it feels much smoother than 1000 grit wet dry

please advise
 

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whats the difference in a stone's "grit" rating vs. sandpaper

please correct if grit is incorrect terminology

i have a stone marked 600 it feels much smoother than 1000 grit wet dry

please advise
The short answer is that there isn't one, single international standard for abrasives--even within types likes stones.

For a quick snapshot of the variety of standards, take a look at this web page by Steve Bottorff, who's an expert on knife sharpening:

http://sharpeningmadeeasy.com/grits.htm
 

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There are standards for grit size and abrasion, plus the types of grit. You are basically comparing the roughness of an apple vs an orange.
 

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The grit size is the same but the application/results may be different. Stones are hard and flat (if maintained) which will give you sharp edge. With paper it will roll/move under pressure so you don't quite get the sharpness as stone. But this is very ? due to many variables, force used, backing, wet/dry. In belt or disk form moving.
 

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Grit ratings vary all over the world and Asia, Europe and the U.S. all use different systems. Some manufacturer's will give you an "equivalent" rating. Most won't. Go with coarse - medium - fine.
 

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Discussion Starter #7
in part general question

i got some stones a few years ago and used them to polish up some mating surfaces on 1911. bevel on FPS. nothing too technical, all flat surfaces, no sear / hammer work...... sort of an intro to stoning......

fast forward 5 years buy a CZ and everyone in that community is using sandpaper...

i thought most of that work on flat surfaces might be better served by stones....

today I stoned some of the mating surfaces on cz upper, quick 5 minute job and noticeable difference in smoothness. still was able to get some mirror like finishing....

i like the stones much better than sandpaper!!!!!!!

stones marked edm am-8 polishing stone one is 400 other is 600 i thought i had a ceramic 1000.

picked up a piece of 1000 grit wet dry and was much coarser feeling compared to stone... hence my question.
 

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There are sharpening methods out there that utilize PSA "sand paper" on glass to substitute for a multitude of stones. Straight razors have been honed this way, and you ain't getting a sharper edge than that. I'll stick to a stone for sear work though.
 
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