Thursday, April 24, 2008

Raku Tea Bowl

This tea bowl is a beauty. I love the soft gray and the complimentary iron red coloring.

The colors came from a slip applied to the clay when it was leather hard. When the slip dried to the touch I carved the grass motiff marks through the slip and into the clay body. Once the pot was bisque-fired I glazed it with Paul Soldner's Clear Raku Glaze.

The gray color looks just like the ancient Japanese Shino called Nezume Shino (mouse gray).

I found the slip recipe on the internet when I was researching Shino.

John Baymore Shino Slip: EPK 25, OM4 25, G200 Feldspar 20, Flint 20, Borax 5, Zircopax 5, Add: 9% RIO and 0.25% Cobalt Carb.

In the original post I found on the internet it said that the slip would turn shino you put over it blue and that it works well with "Linda's Pink Shino." I've had the recipe for a couple years but just recently found a post on Potters.Org from John Baymore regarding this recipe. He said there's no big magic in the recipe and in fact, it isn't even his recipe. He found it in the book Clay and Glazes for the Potter by Rhodes. Whoever the source, this is a great slip for cone 10 stoneware and looks to have a lot of potential for Raku fired pottery. I can't wait to try it again.

A couple other notes: I found a studio to rent about 5 miles from my house. I started moving stuff into it a couple weeks ago and fired up the raku kiln last weekend. If all goes well I'll move an electric kiln and a wheel into it this weekend. Also I've been invited to participate in the 2nd Annual Viroqua Empty Bowls Project. The first one was held last October, I believe. There is an organizational meeting tonight in Viroqua at the Drifless Cafe. Stay Tuned. More to Come.

Thursday, April 03, 2008

Temmoku Glazed Coffee Mug

I really liked the textured pattern on this mug and the Temmoku glaze really brought out the band of stamped impressions.

The impressions were created using a square leather tool stamp before the handle was added.

Stonware, cone 10 reduction fired.

The interior of the mug was glazed with Viterbo Chun.

BSU Temmoku Glaze Recipe
Potash Spar 3368gr, Flint 2176gr, EPK 800gr, Whiting 1400gr, Red Iron Oxide 1000gr.

Viterbo Chun Glaze Recipe
Potash Spar 42, Flint 29, Whiting 19, Talc 4, Kaolin 3, Colemanite 3. Add: Bone Ash 2 and Red Iron Oxide 1.

Tuesday, April 01, 2008

Carbon Trap Coffee Mug

Its a good thing I took photos of my last batch of coffee mugs. I made about 30 and they're all gone. This was one of my favorites. I just like the earthiness of the glaze, it was a good size (10-oz.), and it just felt really good in the hands.

This mug was glazed with a base coat of Carbon Trap and then the Rim was dipped in BSU Gloss Turquoise. This kiln was not heavily reduced. Had it been, the carbon trap would have trapped jet black carbon into the glaze.

Carbon Trap Glaze Recipe, cone 10 reduction

SodaSpar 30%, Neph. Sy. 30%, Spodumene 30%, EPK 10%, Add: Soda Ash 5%

BSU (Bemidji State University) Gloss Turquoise, cone 10 reduction

Custer Spar. 5570gr, Whiting 1000gr, EPK 300gr, Barium Carb. 480gr, Zinc Ox, 200gr, Flint 750gr, Cobalt Carb 40gr, Chrome Ox 80gr.