From: "Dwight K. Elvey" 
To: atm{at}shore.net
Reply-To: "Dwight K. Elvey" 


>From: "Scott Berfield" 
>
>Hi,
>
>After another bout of scratch removal (don't ask -- it involves the
>spouse being "helpful" and we don't want to go there) I am
now back to 9
>micron. I have seen people argue for both stopping at 9 and also for
>going ahead to 5 as a final stage of fine grinding. Any opinions?
>
>Also, I have some grits labeled 1000 and 2500. How would these (grayish
>colored) relate size-wise to the 15, 9, and 5 micron aluminum oxide
>grits?
>
>-sb

Hi
 My understanding is that 2500 is about 10 micron. You may
find that the 10 micron aluminum oxide produces a smoother finish because
the carbide is made of sharper chuncks.
 I've seen little difference in time from 10 micron to
polished for going to 5 micron first and then polish, compared with just
the 10 and then polish. The risk of scratching is much greater with 5
micron as well. Dwight

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