Glazed the Trophies, Results to Follow

I made an unplanned trip to Addison yesterday to the Craft Guild of Dallas to help instructor Potter James fill the gas kiln. I glazed all 12 of the horse show trophy bowls shown in my previous posts in double time, from 2-6 pm. I used my own batch of Pinnell Celadon from home as the interior glaze, leaving the outermost rim band bare of glaze. Celadon is pale jade green and transparent, which will display the decorations underneath nicely. Then I sponged on wax resist to keep the outside glaze from sticking to the bare rim and first 1″ of celadon glaze.

Example of Celadon, on a beautiful 18th century Chinese Hu vase.

I used the Craft Guild’s Ohata on the outside, a nice dark Kaki glaze. Kaki glazes use an overabundance of iron oxide for coloring, which results in a shiny finely speckled rust, brown, and black surface. This glaze is very reliable, and I though the pale jade green glaze, dark blue decoration, and rich brown glaze color combination would be appropriate for the earthy, elegant nature of a horse show. I waxed the tripod feet up to the bottom surface, allowing the Ohata to coat the cut out channel along with the outside walls and inside the foot ring.

A good example of Ohata on some faceted bottles.

Actually, Celadon and Ohata are both colored with iron oxide. Celadons use a small amount per batch, usually 2-5% of the total gram volume or so. Ohata probably uses about 15-20%. Iron oxide is extremely intense, even in the raw state it gets on everything and doesn’t wash out too easily. Which may be why over-saturating the glaze past the point of opacity with iron creates a color family similar to iron oxide stones found in nature. I’m excited to see how the trophies fire out, and I fully anticipate success. Okay, if I need to re-make one I’ll bull through it, but hopefully no more than that. I expect to be able to show you the finished pieces by Monday or Tuesday.