For nearly two years I have been using a Janice Tchalenko base glaze which I have been battling with to get consistent results. In the interest of lowering my firing temperature from 1280 C to 1260C my tutor shared a Greg Daly base recipe. As I have now formulated a new clay body recipe I wanted to see how the new clay responded to the new glaze.
Fourteen test tiles were made to play host to my old slate glaze, my lava glazes and my new slate glazes. My results were as follows.
No 1 - Tchalenko thick application
No 2 - Tchalenko medium application
No 3 - Tchalenko thin application
No 4 - Thick 6064
No 5 - Thin 6064
No 6 - Thick Hiara 75063
No 7 - Thin Hiara 75063
No 8 - Thick 4454
No 9 - Thin 4454
No 10 - Daly no slate
No 11 - Daly fine powder
No 12 - Daly fine powder
No 13 - Daly coarse powder
No 14 - Daly coarse powder
I am really happy with the results. The fine powdered slate produced a lighter blue whereas the courser slate particles resulted in a deeper blue colour. The rutile is providing a more running consistency which results in more movement in the glaze. More coverage was obtained when using the fine powdered slate.
Top row No 1 - 7, Bottom row No 8 - 14
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