Clay Times; Vol. 8 Issue 4; July August 2002; pg. 56
Floating Blue was adapted from a ^8 glaze. The Potters Complete Book of Clay & Glazes by James Chappell, 1991

47.3 Nepheline Syenite
27 Gerstley Borate
20.3 Silica
5.4 Kaolin (EPK)
_________________________________
100

ADD
2 Red Iron Oxide
1 Cobalt carbonate
4 Rutile
2 Bentonite