Thread: What is the highest grit you have used on a stone?

Originally Posted by gssixgun

I used to go to 1k, but when I bought the Shapton DGLP (325 Grit) and a Shapton 30k, I said "Huh 325 is recommended for a 30k stone" and that was it from then on... Now I use a DMT 525, that would also be known as a well worn DMT 325 or the Shapton DGLP that's it....

I think I am around DMT 425

Originally Posted by niftyshaving

+1

I might note/ add that the initial slurry will finish the
process as the early hone strokes with a razor
worry the slurry and the hone surface to finer bits.

After this the dilution process will further remove the
aggressive slurry and leave the hone "just right".

Folk that tape might also consider that the
steel of the spine is part of this process. The
a'retentative folk might use that old razor with
a lot of hone wear for a half dozen strokes to
condition the hone surface. The old razor may become
your fav' shaver in the process. To one degree
or another this initial slurry interaction takes
place on any hone and with many a nagura/ rubbing
stone.

In my opinion, circles and Japanese strokes that
we see in video by the better hone masters when a razor
first touches the next hone optimize this process

Over time a DMT will calm down and this is less
an issue. You want a DMT that is coarse enough
to be durable and aggressive enough to remove
that half a sheet of paper bit of hone that is
needed to keep the hone flat enough over time.
The slurry is a key byproduct...

I just finished this as seen in this thread( Chinese 12k dressing stone) and it works quit well. I believe it just may take away that first razor smoothing effect or take the place of. It definitely smooths out the roughness left from the DMT.

Using a 1200 DMT may ruin the DMT, so I've heard.

1K sandpaper is my standard on manmade stones. On naturals, I typically will use a J-nat on a J-nat, a Thuri on a Thuri, coti on a coti, etc. No science behind this -- it's just what I do.

Originally Posted by nun2sharp

I watched Sham run his diamonds down the drain while lapping a Charnley.

Lapping my CF was what turned my DMT from an aggressive cutter to a well worn in stone! It went from 325 grit to about 600 in that one session.

But yes, I use a 325 DMT for all my lapping and it works great. No need to go any higher than that IMHO.

Since acquiring a Chosera 1k and using it as a bevel setter, I have relegated my Norton 1k to being a lapping stone.

Jerry
____

I used to go to 1k, but when I bought the Shapton DGLP (325 Grit) and a Shapton 30k, I said "Huh 325 is recommended for a 30k stone" and that was it from then on... Now I use a DMT 525, that would also be known as a well worn DMT 325 or the Shapton DGLP that's it....

325. Like Glen, I have a DGLP and a DMT 325. I have used both on stones up to Shapton 30K with no ill effects.

Originally Posted by Brighty83

I have done a google for SiC (silicon carbide powder) powders on float glass but i cant find much. The lowest grit i could find was 120. Do you have a site you recommend of the powders and the glass?

Shapton sells abrasive powders for use with their cast iron lapping plate. I don't know what the material is and, frankly, I'm too lazy to look it up :-). Check their site, I would assume that Shapton has given some thought to what would work well as a lapping compound.