I'm confused. Do these stones have to be lapped (flattened) before each sharpening session?
Printable View
I'm confused. Do these stones have to be lapped (flattened) before each sharpening session?
Not necessarily before each and every session. They should be flattened before the first go round and then as needed which depends on how much honing you do on them. A straight edge is one way of checking. More info here.
Are they really that bad off that they need flattening straight from the factory?
What do I need to flatten them?