
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