Never heard of Kalium strings. Apparently they are steel and nickel, not all that unusual. The site is a trip, though. I find it a bit odd that they offer 6, 7, 8, 9, 10, and 11 string sets for guitar, but no 12 string sets? Maybe I should have passed on my 12 string Series I and waited for one of those Alembic 9 or 11 string guitars. Of course I might still be waiting - perhaps this is the exception that proves Paul, tbo's rule that there will always be another.
Bill, tgo