Tag-Archive for ◊ Chris Baumann ◊

27 Aug 2009 Salt Glaze Workshop Part 2

The second week of this three-week workshop involved decorating the platters that we had made the week prior as well as any pieces that we had brought from our own studios.  Chris Baumann’s business partner Stacy Stanhope was back from Vermont; as a student, I learned several different techniques from these two artists.

The first technique was to create a bas-relief on the platters from the previous class. We each had a platter or two with a thin skin of porcelain over Lizella . We drew broad patterns on the platters then painted part of the pattern with shellac. After the shellac dried we started wiping away the porcelain with wet sponges. The shellac will burn off in the kiln leaving a great contrast between the white porcelain and the dark Lizella clay. It will also leave a relief texture. I have one piece where the porcelain is very thick; this gave quite a deep bas-relief. I’ve used a variation of this technique on porcelain pieces without any other clay underneath; I’m excited to see the results of this adaptation.

Greenware Platters

Greenware Platters

Next we did some sgraffito on greenware. This process involves coating a piece with a thin coat of slip or under glaze and then scratching through the veneer to reveal the color of the clay body underneath. We put black underglaze over light colored stoneware. One student also coated the black underglaze with wax before scratching the surface which is supposed to keep the lines cleaner. The drawing I did has very fine lines and no major areas of glaze removal. Chris is worried that it will be too dark and not show much, if any, flashing. I might just be wasting the salt glaze on this piece, we’ll see.

When we were done with the sgraffito pieces we did some work with wax resists . We painted a pattern onto our bisque pieces and then glazed the entire piece. The glaze will not stick wherever the pot is waxed. Just like the shellac on the previous pieces, the wax will burn off in the kiln. When one does this on a pot that is fired in an electric or gas kiln the wax will reveal the raw clay body. When this is done in the salt kiln the salt should glaze the entire piece with a variance in color between the standard glazed areas and the waxed areas.

Bisque pots

Bisque pots

The hardest part for everyone in using these techniques was the need to visualize backwards as we were working with negatives. A lot of thought needs to be put into which part of a design is staying and which part is being removed by the wax, shellac or scratched off in the sgraffito. If a mistake is made on sgraffito more glaze can be added to cover the mistake, wax can be burned off with a torch but shellac is not as forgiving so careful planning is recommended.

Next Saturday we unload the kiln, I can’t wait!

19 Aug 2009 Salt Glaze Workshop Part 1

Last Saturday was the first day of the salt glaze workshop with Chris Baumann of Clay Fetish Pottery. Due to a miscommunication in the times of the class I was extremely late; essentially I missed the entire workshop. Chris was wonderful and insisted on hanging out and going over everything again while permitting me to make the platters as promised. This also benefited a couple of the other students who wanted to stay and do more work.
We made the platters using a slump mould that Chris had built. It was created to accommodate making multiple oblong platters which was a great idea for the class as well as for producing a good supply of these for inventory. If I like the way these come out (and so far I do) I may consider building one of these forms for myself.
The slump mould is an interesting way of creating pieces. The clay is rolled out using a slab roller and then laid over the mould; when the clay was a bit firm we worked it into the oblong hole in the mould with a soft rib, gently shaping the curve of the platters. After allowing the clay to dry a bit more the platters were removed from the mould and the edges were cleaned with a grating tool and then smoothed with soft ribs. Once this was completed we added feet to the bottoms so the curved platters were able to stand.
We made the platters out of Lizella, porcelain, and stoneware so we can experience the ways the salt glaze will react to the different clay bodies. We have some pieces where a veneer of porcelain was attached to Lizella and others where a light porcelain slip was painted over the dark Lizella, the idea being that the Lizella will show through the slip.
Chris also had some stoneware tiles available which the other students made into sushi plates and decorated with slip. I decided not to make any of these as it was getting late.
Chris was kind enough to show me his kilns and discuss the effects of the heat and salt on the equipment. Understanding the extra cost in materials and labor in salt firing may give buyers a new appreciation for the pieces.
Next week we decorate!