Wednesday, March 23, 2011

Cone 6 Glazes / 6號錐氧化燒

On my previous post, I mentioned that two glazes on my tea pot – Orange Street and Creamy Rust are in Mastering Cone 6 Glazes. I think I was wrong. A blog reader couldn’t find the recipes from that book.
Here are the two glaze recipes I would like to share.
Just a friendly reminder!! Cone 6 glazes react to work-heat ratio slightly different from the cone 10 glazes. A different firing program could change how the glaze turned out from firing. Always run some tests on smaller pieces before you use them on your “real” works.
I fired my works in Cone Art kiln (have I ever mentioned that Cone Art is my favorite kiln since I was working for the porcelain company in Taiwan : ) with fast glaze program and hold at cone 6 for 20 minutes.
I got most of cone 6 glazes from Sawtooth School for the Visual Art, Winston-Salem, NC, where I am teaching an intermediate/ advance wheel-throwing class.

Silica 15.2%
Talc 13.8%
Dolomite 8.1%
EPK 4.5%
Gerstly Borate 17.9%
F-4 Feldspar 46.8%
Red Iron Oxide 12%
Bone Ash 12%
Crocus Martis 6.2%

Custer 26.6%
Strontium Carbonate 3.3%
Frit 3134 30.6%
Wollastonite 10.6%
Talc 2.3%
EPK 8.4%
Flint 18.2%
Red Iron Oxide 6%
Tin Oxide 5%
Zircopax 8%

my glaze logs recorded how I applied and fired each glaze

glazed the whole piece in Orange Street and then dipped around 1/3 of the piece in Creamy Rust 

when Creamy Rust is over Orange Street, it tend to run

Monday, March 7, 2011

24th NC Pottery Conference

Over the weekend, I attended the 24th NC Pottery Conference and worked with 6 Chinese students from ECU to help out with translation.
It was a wonderful conference that provided an opportunity to American potters to get a close look of Jingdezhan porcelain making process.
There were 5 demonstrations going simultaneously; Wheel throwing, Trimming, Under glaze decoration, Over glaze decoration, and Slab-building. Each master has been working in his/ her professional field more than 10 years. They were like treasure boxes for the attendances to explore.
If you missed this conference, you can visit Odyssey Clay Center and Penland this Wednesday (slide presentation only) and ECU Speight Auditorium on March 14 and 15 (demo and penal discussion.)

5 presenters from left to right (in front of monitors): Master Feng, Shangjin (overglaze painter), Prof. Feng, Weina (underglaze painter), Master Dai, Guanyu (trimmer), Master Zhan, Shaolin (thrower), and Master Xie, Zhenghua (slab building)

Master Zhan, Shaolin - throwing with no sponge and no cutting wire. He apply slip from his hands to pot and cut off pieces from the hump by fingers

7 hours of works (more pieces on floor). Some pieces were designed by audiences with specific dimensions

  Taking a short break in front of his works

Master Xie, Zhenghua joining slabs with no scoring. On Jingdezhen porcelain, scoring would create uneven join surface and increase shrinkage.