Originally Posted by
Steve56
But I have some jnats that are really, really hard. Not Ark hard of course, but with a tomo of equal hardness it will take 3 minutes or so to raise a light slurry with moderate to heavy pressure. They glaze to some extent, like an Ark maybe. I can de-glaze the stone (and nagura) and it works faster, but does a hard, glazed, jnat act finer like a hard burnished/glazed Ark? I think maybe a glazed hard jnat does finish finer than an unglazed one, but thought that I’d throw out this question for the jnat folks. Oz, Stefan?