Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Total 100
Bentonite 2
Cobalt carbonate 0.5
Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Total 100
Bentonite 2
Cobalt carbonate 1
Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Total 100
Bentonite 2
Cobalt carbonate 1.5
Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Total 100
Bentonite 2
Cobalt carbonate 2
Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Total 100
Bentonite 2
Cobalt carbonate 2.5
Rutile 4