Understanding Stoneware Glazes
Today at the Craft Council from 2 - 4:30 pm, Mike Bailey led a lecture on understanding stoneware glazes.
A quick demo on LOI was done and the reasons explained. He took us through a quick calculation on % analysis. Without the calculation, we cannot plot the graphs. Then we each took some tiles and assign codes to them by appearance; going from matte to transparent. From this grid/chart, we understand where the eutetic point of the glaze is. Knowing this position, we know how to balance a glaze.
We can also plot the position of a material. It helps to have this knowledge for adjusting glaze; sometimes, it has to do with the flux, and sometimes, it maybe the silica that requires adjusting.
All this information is in his book. He made it much eaiser to understand by showing us all the fired tiles.