So I'm fairly happy with the shape of these pots, but why is it, this glaze that I've been using for 20 years, once in a while pits like this? Is it underfired? Are they putting out less juice so the kiln never gets up to temperature? More importantly, should I try to touch them up with more glaze and refire? I guess I don't have much to lose by trying again.
First thing to try is re-firing. Like many iron saturate glazes, could be that the iron oxide starts to reduce as the glaze reaches maturity and the oxygen out-gassing (boiling) left pinholes that just didn't have time to settle back down.
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