
Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Bentonite 2
Manganese dioxide 1

Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Bentonite 2
Manganese dioxide 2

Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Bentonite 2
Manganese dioxide 3

Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Bentonite 2
Manganese dioxide 4

Custer feldspar 75
Gerstley borate 10
Whiting 10
Silica 5
Bentonite 2
Manganese dioxide 5