RoyOdom Posted May 13, 2016 Report Share Posted May 13, 2016 I have a wonderful aqua glaze that has been reliable for years but now pinholes consistently. I fire to 2185 w/a 30 min hold, slow cool in a Skutt electric. The recipe is: Flint 26 Laguna Borate 22 Custer Feldspar 20 Frit P25 13 Neph Sy 9 Zinc Oxide 7 Talc 3 100 Add: Copper Carb 2.5 Any ideas for why this is happening or how to fix it? Link to comment Share on other sites More sharing options...
bciskepottery Posted May 13, 2016 Report Share Posted May 13, 2016 Have you gotten new supplies of any of the materials, particularly custer feldspar? There have been some chemical changes in custer at mine source. Link to comment Share on other sites More sharing options...
RoyOdom Posted May 14, 2016 Author Report Share Posted May 14, 2016 Yes, and I'm concerned that that could be the issue so I'm going to try subbing minspar and see if that helps. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted May 14, 2016 Report Share Posted May 14, 2016 Lots of recent gripes about Custer spar changing. Marcia Link to comment Share on other sites More sharing options...
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