Cone 6 Oxidation

18.69 Gerstley Borate
9.35 F4 Feldspar (soda)
56.07 Alberta
6.54 Lithium Carbonate
________________________________

90.65
This does not add up to 100. The recipe is correct.

ADD
9.35 Supermax (Zircopax)
4.67 Tin Oxide