Coticule - Diamond plate

[TristanLudlow]

I just flattened my La Grise with a diamond plate because it was way out of whack.

I then honed on it and disliked my shave, which is very atypical.

Then I read this:

A diamond plate on a coticule will cleave the garnets. Leaving jagged edges which defeats the whole purpose of using a coticule. It is the natural shape of these garnets that give that characteristic coti edge. Some do it though and say it is fine, but not so much under a microscope. Coticule will usually be much faster after lapping till they settle down.

What do we think of this, and if so how do we "fix" this?

Do I burnish them? hone some razors on it dry, use my slurry stone wet/dry? Rub some Coticules against one another?

As I also found this:

A Coticule contains garnets for abrasive medium. When we moist the Coticule's surface and rub it with another piece of Coticule, garnets are released into the water.

Any input is greatly welcome,


In the old video (1970s) I posted about the Coticule, the people used to take GREAT care to finish the stone right, I'm sure they were very knowledgeable about the why they had to do this after the stones were sawn.

[STF]

I just flattened my La Grise with a diamond plate because it was way out of whack.

I then honed on it and disliked my shave, which is very atypical.

Then I read this:




What do we think of this, and if so how do we "fix" this?

Do I burnish them? hone some razors on it dry, use my slurry stone wet/dry? Rub some Coticules against one another?

As I also found this:


Any input is greatly welcome,


In the old video (1970s) I posted about the Coticule, the people used to take GREAT care to finish the stone right, I'm sure they were very knowledgeable about the why they had to do this after the stones were sawn.

I'm new with a Coti as you know but if it were me, I would probably make slurry to release some of those jagged garnets.

[TristanLudlow]

I'm new with a Coti as you know but if it were me, I would probably make slurry to release some of those jagged garnets.

That's indeed what I was thinking, I can totally understand that a little layer has cleaved garnets.

I guess I will use my slurry stone to remove a few layers of pencil grid lines, thanks!

[DZEC]

I used to raise slurry on my coticule with. coarse diamond plate. Now that I think about it, the edges I get after using only my slurry stone for a long while seem much better. I second Steve’s suggestion.

[Marshal]

Can't hurt to try working up slurry a few times to wear off any aggressive edge that may have been caused by the diamond plate. I've also improved the result from my coticule by burnishing the stone. There's also the possibility a piece of diamond grit may have broken off and dislodged in the softer coticule material.

I don't know how much flattening was required, but another thing to keep in mind is that these are natural stones and by no means uniform. You may very well have found a layer in the stone that won't perform the same as it did before you took the plate to it. But I imagine that's a rare case unless you see some sort of aberrant spot or inclusion in the stone's surface that hadn't previously been exposed.

[TristanLudlow]

Thanks everybody.

Had some visible scratches on the BBW & Coti side of my stone,
raising a slurry and a few rubbings quickly and easily removed them.

It does make sense that the surface garnets are damaged by using the diamond plate, but it cleans up very nicely with the slurry stones.