Thursday, May 7, 2015

What's with the Pitting?

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.


  1. 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.