I'm pondering how to best finish some stones from the wild that I just flattened on a granite reference plate...and I am confused about some aspects of prepping stones where there isnt a known grit reference to target. Maybe I am over-thinking it?
I have two nice Hindostans perfectly flat. They have very different characteristics, with one being quite soft, the other being harder. One horizontal strata, the other vertical. Harder stones it would seem would have a higher 'potential grit' than a softer one?
It seems most people suggest to flatten 'fine stones' to 1200grit and 'rough stones' to 600grit.
both of my Hindos just came off 220grit, and make a hollow ground sing with pretty different tones.
When will I know that I am over-polishing the surface, and just dulling the surface layer?
/confused
I have two nice Hindostans perfectly flat. They have very different characteristics, with one being quite soft, the other being harder. One horizontal strata, the other vertical. Harder stones it would seem would have a higher 'potential grit' than a softer one?
It seems most people suggest to flatten 'fine stones' to 1200grit and 'rough stones' to 600grit.
both of my Hindos just came off 220grit, and make a hollow ground sing with pretty different tones.
When will I know that I am over-polishing the surface, and just dulling the surface layer?
/confused