Rarely does a clay body formula produce exceptional results from cone 6 to cone 10 in oxidation and reduction kiln atmospheres. Sheffield Z can be used in soda/salt and wood firing kilns resulting in orange peel and flashing clay surfaces. This is a throwing body that can also be used for slab and coil building. The Z formula has been popular with potters in the Northeast for many years producing functional ware. A unique element is the use of Sheffield Processing of screened fire clay which has been incorporated in the formula to produce a smooth workable clay body. Originally developed by Jeff Zamek at Alfred College of Ceramics in 1973- the formula has a long and reliable production history.
Clay specifications
- Temperature Range
- Cone 6-10
- Grog
- Fine
- Color In Oxidation
- Light Cream
- Color In ReductionReduction
- Med. Brown With Iron Spots
- Shrinkage
- c/10/ox./ 13.00%
- Absorption
- c/6/ox./ 2.80%
c/10/ox./ N/A
Wood fired for a nice toasty brown...
Shown below is the base and rim with Tenmoku breaking to clear.
Fired cone 10 Noribigama: Quick firing, medium reduction:

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