Big coticule

[kcb5150]

Was not fun to lap. Thin layer dished and convexed in subtle ways. Had to be so careful to not rock the stone during the initial lapping. I couldn't have gotten a better result. The outcome exceeded what I was expecting. Hardness plus using 600 grit helped me control it.

[kcb5150]

Still need to sort the bbw and get a clean track. 8 5/8" x 1 13/16"

[Geezer]

I have found (YMMV) that the Coticules with inclusions work very well and quickly compared to plain ones. Maybe I have used about twenty Coticules over the years.
~Richard

[kcb5150]

I think there is more in play with coticules with certain types of inclusions or coloring. Ppl just think garnets, but quartz comes into play I think. The slime green ones have other factors in play as well I think

[kcb5150]

Bbw has sort of rusty colored streaks and glitters heavily. I suspect this is going to be fast going by how it has murdered all the sic based abrasives it has touched

[kcb5150]

https://m.youtube.com/watch?v=JE9uwG...ature=youtu.be

[kcb5150]

Surprisingly it seems dead slow on water. Has crazy, skatey feeling under the blade. Hone feels hard and like a salad of textures but no harm is being done. Will be interesting to test properly. I need to dig up a really soft slurry stone

[dinnermint]

Can't get the video to load. In your latest post, are you talking about the bbw side? That looks closer to a slate/schisty color to me.... but I am on my phone.

[kcb5150]

Oops. I will fix that. No it is a natural combo. The coticule is hard and skatey, the bbw feels like.... bbw. Give me a second

[kcb5150]

https://youtu.be/JE9uwGqsIl4