Search:

Dunno. Can't read Kanji :)

I used bicarb in water on my Kings & Jnats for years. When I started buying modern stones I stopped. It was 2 easy to use the wrong water bottle. Also one of my...

Because it says so in the instructions. :)
Even too long a soak can soften the surface of a Shapton Pro.

Sodium carbonate sold by Namikawa also comes with a warning.
Sodium Carbonate |...

Depends on the stone . You will dissolve or at least degrade the surface of some modern stones with it while for most naturals & old fashioned waterstones, it's ok.