Finishing on running water, oil or as I do with a few drops of glycerine (washing up liquid or shave soap) really bumps up the edge.
That sir looks to be a top quality coticule.I have very little knowledge with regard to natural whetstones. All I have is an Adaee #12000 Cnat.
This morning a friend of mine gave me a natural whetstone that he found in one of his farm sheds. He knows nothing about this whetstone and cannot recall ever using it. When I received it, the surface was in reasonably good nick but did have some slight dishing in the middle area. The size is 180mm x 40mm with an overall thickness of 21mm. It consists of a light coloured stone of about 3mm thickness with a dark red stone under about 19mm thick. The light coloured stone was obviously the honing stone.
I have now lapped the whetstone flat. The hardness I found to be about mid-way between my #12000 Cnat (very hard) and my 8k Chinese synthetic. The surface reminds me very much of silver ash timber. I haven't used this whetstone yet but am thinking of using it to refinish one of my pasted balsa stropped Titan T.H.60 SRs and then compare it to a twin T.H.60 that has been finished on my #12000 Cnat.
View attachment 1528638Any idea what this whetstone could be?
Lapped surface - dry
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Lapped surface - wet
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Lapped surface - closeup
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Whetstone side
Some of these coticule respond well to different levels of surface conditioning. If the stone is used more for finishing and refreshing the stone can cut significantly faster, and hopefully burnish along the way, and give you a nice finish.The results of my first Coticule edge shave can be found here.
I doubt if I will ever use this Coticule for anything other than a finishing whetstone. It is just so good. I don't want to wear it out before I die.
I'll second this with also saying that a fine, soft slurry stone is ideal. I've got a couple small lpb slurry stones that are perfect for this.Another Coticule-Convert. If you want to significantly prolong the life get a combo slurry stone and lay off the diamond plate.
Now delete the words Thuringian and Escher from your brain. You really need to stay away from that kind of smoothness.
It's usually pretty easy to wash the oil off, worst case is you have to raise up a small slurry. I have seen so many stones that appeared to be used with oil and all it took was a quick lapping and it was fine. Here is one coticule that when I originally got it, appeared it was used with oil only Lightly lapping it and it was a water stone again (only reason it took the middle longer was because it was dished). Now I use it on and off with water or oil, and a simple wipe down after.I am reluctant to use oil on the Coticule for fear of the oil impregnating the stone. My preference is for a lather with the final finishing laps.
I have not used an outside developed slurry on this whetstone. For now I will stick with the very light slurry auto-developed while honing. I like to learn slowly.
I am reluctant to use oil on the Coticule for fear of the oil impregnating the stone. My preference is for a lather with the final finishing laps.
I have not used an outside developed slurry on this whetstone. For now I will stick with the very light slurry auto-developed while honing. I like to learn slowly.
Oil won't penetrate as coticules are not porous I do prefer prorasos lather on them if I go a non water route.I am reluctant to use oil on the Coticule for fear of the oil impregnating the stone. My preference is for a lather with the final finishing laps.
I have not used an outside developed slurry on this whetstone. For now I will stick with the very light slurry auto-developed while honing. I like to learn slowly.
Be careful, because they tend to multiply quite fast.
The stones are addicting. Nobody owns just one.
Same here. Nice looking stone, @rbscebuHey, I only have one-
The term lather means different things to different people. For some, the term means slurry. For others, it means lather made from soap.
Just remember that slurry contains garnets. If you want to finish with minimum garnets, rinse the stone, rinse your blade, and wipe the blade.
I am also new to Coticule world, but some of my best edges have ended with only water after rinsing all slurry. Like keeping your diamond paste on balsa strops separated.