Thread: Help with extremely though coticule

Originally Posted by JP5

I haven't thought much about the amount of variance in Coti hardness. I guess it the same with most species of stone.
Do harder cotis usually cut faster or do they just normally provide a finer edge?

In my opinion, the harder stones, by themselves, cut slower as the surface is hard and prevents much grit from being exposed or loosened from the matrix.
JMO, YMMV
~Richard

You could also try what I believ is called the "smashed slurry" method. Basically make a slurry with both stones dry, I've gotten my best results with slurries that way. Just be sure to add water slowly, so you don't wash it all off.

But from your results, it doesn't appear that you need a slurry...

Hmmm... I have a couple hard vintage coticules, one that's especially hard, that I will have to play around with more. Thanks for the good tips/ideas/info here fellas!

Originally Posted by Geezer

In my opinion, the harder stones, by themselves, cut slower as the surface is hard and prevents much grit from being exposed or loosened from the matrix.
JMO, YMMV
~Richard

That makes sense. For some reason the I thought a harder stone would be faster cutter. Now that I think about it hard Arks don't cut like soft arks do with pocket knives. Now it seems like a goofy question.