Very unlikely that you ever have to lap a hard ark more than once. Your great- great- great grandkids...... MAYBE. Those rocks are very tough. Those, hard llyn Idwals and Charnleys are the only stones that wear me out when lapping. And apparently this old blue la lune I have... go figure.Oh then I'm in luck, 'cause I love lapping stones over and over apparently.
WARPING - Naniwa Gouken Kagayaki 10 mm , i.e. Super Stone
This has happened to me too - Naniwa Gouken Kagayaki 10 mm. Here is what I mean exactly by warping: Flatten stone both sides. Verify flatness. Dry off with towel and stand up on long side and allow to dry fully for 2 hours. Verify flatness. There is now a noticeable bow on both ends of the...www.badgerandblade.com