Thread: 2 more inbound... Thuri, and Coticule.

Very nice stones.

The missus has gone out and I have all day in and alone.... Could you resist the coticule? I couldn't.

Bismarck 6/8 muller classic, finished on a 12K superstone and running at HHT4.

Built a light slurry, And went with what felt right. No lap counting. Straight stroke only, no X's, circles or back and forth strokes.

3 dilute phases got me onto pure water. The stone doesn't auto slurry at all. Then it all went strange, On pure water the stone feels like gravel. Really noisy, Really gritty. So I stopped and looked at the edge. Nothing looking bad other than a sand blasted finish.

So I did another 3 sets on pure water and all of a sudden one spot on one side of the blade started to feel smooth. So I did another 6 sets until the whole blade felt smooth.

After the whole blade felt like I was honing on glass I took it to a plain veg tan strop, no pastes. 100 laps. HHT4, and a very smooth edge.

This rock is really strange, no water undercutting on pure water, Gravel phase, Then glassy. To give a really nice edge. I think I got an easy coti finisher!

The only thing I can think for the gravel phase is a change in attack angle from slurry to pure water. And the edge pushes more into the rock without the slurry. So that stage requires the extra passes to push past that point.

that's interresting, I have a coti laying around which feel like there is a sort of gravel when honing on it using plain water, I actually wrote it of thinking it was no good but now after reading this I think I'll give it another try

Respond to how it ends up working, I can't play with mine now until my birthday. So I can't hone up another razor to see if it was just fluke!

The change in feel was dramatic, so you should be able to tell if it's working after a few sets.

Here is the light green thuri I spoke of earlier in this thread. As mentioned the inclusions rendered it un-usable or “Toxic”. Too bad, maybe more lapping would have worked. It was and is not my stone. Incidentally, I would stack any of my quality Thuringians against my best J-nats any day. It just depends on the steel.
Mike