More Raku Glaze Recipes

I know I haven't posted anything of great interest for a while. I am going to post a couple more Soldner Raku Glaze recipes. I can't believe I have so many. Anyway, here are a couple more.

Soldner's Copper Luster Raku Glaze
Gerstley Borate 80%
Nepheline Syenite 20%
Add: Copper Oxide 2%
Add: Cobalt Oxide 1%
Add: Copper Oxide 3%

Soldner's Runny Green Raku Glaze
Gerstley Borate 50%
Borax 50%
Add: Cobalt Carbonate 1%
Add: Red Iron Oxide 5%
Add: Rutile 5%

I did fire up my cast iron kiln yesterday. I used wood and then finished it off with gas. Not much in it, just a few tea bowls. I did line the inside chamber with hard fire brick and that really helped with the firing process. This past weekend while searching the internet I also learned of a homemade refractory goo made up of furnace cement and perlite. The materials are cheap and the furnace cement is rated to 2700F. Its so cheap that I'm going to mix some up and experiment with it.

I'll also try to get some photos of my latest firing posted in the next couple days.