Yesterday I glazed some of my low-fire mugs and trivets with the Spectrum 900 series glazes (909, 920, 911, 913). The pieces are made with Asheville, NC's Highwater Clay's Stans Red clay. I bisque-fired them to Cone 04. I had previously fired test tiles with these glazes and a combination of the glazes using the same bisque temperature, the same clay (see 1st photo). They turned out great.[/size]
This morning when I went to load my kiln, this is what I found (see mug and trivet photos). Every piece was affected, whether it had only one coat (the trivets - I was going to put another coat on them this morning) or whether it was ready to go into the kiln with a combination of the glazes.
This was the first time I've glazed with the Spectrum glazes after firing the test tiles. I can't imagine what went wrong. I don't want to throw away new jars of glaze, but I'm afraid to use them again. I've glazed other pieces from the same bisque load (same clay) with other glazes….Stroke n Coat and Amaco's LG-11….. and haven't had a problem.
Any help would be greatly appreciated. I emailed Spectrum, but thought someone on the forum might have some idea.
MossyrockMember Since 22 Aug 2010
Offline Last Active Oct 31 2014 08:14 AM
I have always enjoyed creating art using things I find in nature. Several years ago I attended a festival event where a potter was demonstrating throwing on the wheel ..... I was instantly hooked. I started taking classes at the Sawtooth School for Visual Art in Winston-Salem, NC and now have a studio in my home and occasionally teach at the Sawtooth School. I am primarily a handbuilder, but occasionally work on the wheel. Although I make some functional pieces, I gravitate more toward creating art that can be used in landscaping. In addition to working with clay, I also make concrete sculptures, and sometimes combine the two. If I'm not in my studio, I am probably on the lake bass fishing or working in my flower gardens. I am retired and enjoying doing the things I wasn't able to do while working . In addition to fishing, I enjoy reading and traveling.
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bass fishing, reading, travel, photography, classic movies, gardening