Here are the test tiles that I have made so far.
My favorite glazes are #4A, 5A, 7A, and 12A.
4A is Copper Red#2
5A is Leach White
7A is Seacrest Purple
12A is Chopper Red#2
4A Chopper Red#1
G200 - 73.8%
Gersley borate - 10.2%
Whiting - 11.1%
Flint - 4.9%
Chopper crab - .35%
Tin oxide - 1%
12AChopper Red#2
Gertsley borate - 8%
Whiting - 15%
Nepheline syenite - 13%
EPK - 9%
Flint - 30%
G200 - 25%
Ting oxide - 2%
Chopper carbonate - 1.5%
G200 - 40%
Flint - 30%
Whiting - 20%
EPK - 10%
Superpax - 8%
Ting oxide - 2%
7A Seacrest Purple
G200 - 53.7%
Whiting - 12.9%
Gerstley borate - 2.5%
EPK - 6%
Flint - 22.4%
Zinc oxide - 2.5%
Black iron oxide - 3%
Rutile - 3%