I'm so overwhelmed that I'm not sure I can find my way out of a paper bag, but if you let me talk in slow motion, I'll bet I can explain the Unity Molecular Formula to you. I must admit that the geek in me wants to work out UMF for my cone 10 glazes to see if they'll work in cone 6. Then Marian who was sitting next to me suggested just dipping some tiles and firing them. Where's the fun in that?
Now that the workshop is over, I have almost 200 test tiles to analyze. VC 72 is what I've been using in electric. the tiles next to those are SDSU Texture. It's pretty groovy. John might have better pictures on the Clay Club blog.
We made tiles in sets of 10 in 3 different clay bodies for 3 different firings. I am relieved that my testing at home will never be that complex. I'd say nearly 75-85% are destined to be thrown away or stored out of sight. That leaves plenty to work with for next weekend's firing. I'm probably going to mix up 3 or 4 full buckets and then as many new tests as I can stomach. There are several glazes I would like to line test. I think I bisqued around 75 tiles this week so I'll have to stop somewhere.
Thankfully, I have to travel across the state tomorrow, so I can take a break from all this glaze theory and clear my head.
For those of you who have the inclination, I would highly recommend one of John's glaze workshops. He is an excellent instructor and a super-nice guy. He didn't make anyone in our class cry.