Martha Muzychka on fri 29 mar 96
Anne Chanbers wrote:
I just finished firing the kiln, using some new Orton pyrometric cones
(when did they change colour?). (....) The new cones seem to be firing
slightly higher than the old white ones at least the ^6.
Has anyone firing at cone 6 oxidation noticed any difference with the
Orton colour coded pyrometric cones?
YES YES YES !!! I recently fired a glaze load at Cone 6, and my satin matt
yellow glaze came out shiny and pinholing like crazy. I had inquired if if
the change in cones was responsible, but the technician didn't think so.
It's the same bucket of glaze for all firings, and I was surprised to see
such different responses when the first two loads fired with the old cone
produced the satin matt surface. I'll probably do more tests before I
decide the difference lies with the cones, but it's nice to know others
have had similar experiences.
Martha Muzychka
Paradise, Newfoundland
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