Open Shelf Firing Base Metal Clays by Martha Biggar

 

616web
I recall so clearly when I first heard about metal clay, back in the late 1990s, in the Rio Grande catalog. I thought I might like to work with it, and took my first class in 2000 (a two-week stint at Arrowmont in Tennessee, with Linda Kaye-Moses). I also recall, equally clearly, hearing about and then using Metal Adventures’ (Original) BRONZclay, when it came on the market in 2008. Such an interesting and different take on metal clay!

And look at us now: we have several versions of silver clay, plus a multitude of base metal clays, with more coming. What Bill Struve started experimenting with in 2006 has grown into an international community of inventors and users, with clays coming from many parts of the world. While I am personally far from a scientist, I do have an inquisitive nature that wants to know many things about the materials we use.

Most of us are aware of some differences in the base metal clays, like color and shrinkage rate. I’ve taught many classes that help others get the feel of different clays, but never went beyond the basics where firing is concerned.   This is the subject of my latest set of experiments, and this article deals specifically with open-shelf firing of base-metal clays; torch firing is the subject for my next major experiment and another article. Continue reading…