OK lets see if I can remember all the things that you helpful wonderful bunch have asked me.
The kiln has always been cooler at the top, ever since new, I know heat should rise so heaven knows how this happens in a top loader. The good old kiln guys came up and fitted controllers to each bank of elements for me some time ago. This works great, allows me to control each set of elements separately and allowed me to even it all out (until I got the problems with the power supply.) The last glaze firing after the new stronger elements were done the other week was very even, but thinking about it maybe it wasn’t packed as densely as this last load. The elements are all taking in the same amount of power according to the little machine that Paul has that tests these things.
I’ve got cones coming out of my ears at the moment (doc says it’ll clear up eventually but is a risk of the job.) I have one glaze and have always used this one, it’s pretty basic, 75% lead bisilicate frit and 25% the red clay body I throw with. It’s a good un but if it gets too hot it then shimmers on cooling. The cones on the left in the pic are from last weeks lovely firing and those on the right from the weekend’s disaster. I’ve put on a bisque today, full of cones and very loosely packed so I can at least see if that makes any difference to the evenness.
My plan at the moment is to wait to see what these bisque cones look like, then to not put so much in the bottom, open the pack out a bit, and to keep my fingers crossed and to do some more glaze tests anyway and to hope and hope and hope. If all that doesn’t work then it’s time for plan b and a job in Tesco!
What I forgot to tell you also is that I got Paul back home on Saturday evening hurrah! (He went off back to work in Middlesburgh very early this morning again sadly) Anyway while he was here I asked him if he could show me how to get pics off my camera onto this computer and he pointed out the little camera card sized slot on the front of the computer that even says on it SD card point. Oh dear oh dear.