GE300
Utah
A black stoneware with black grog, revealing deep fired tones from metallic blue to black.
Official French safety data sheet. The translated version is awaiting regulatory approval.
GE300 · Utah
Choose this clay and prepare your tests
GE300 Utah combines metallic-blue to almost black shades with black grog. Compare IMP, CHF and CHM for your intended surface; use the firing samples to assess how the colour develops.
Two references to explore
- Anthra · GE7001080–1150 °C · CHF / CHM
- Sword · GE4001000–1280 °C · IMP
Compare colours and preparations while checking each clay’s firing conditions. Your choice must suit your kiln, decoration and intended use.
Record preparation, thickness, firing cycle and decoration on each test. Keep an unglazed area to compare the fired result.
Utah, from the wheel to sculpture.
A wheel-thrown piece, modelled portrait, sculptural construction and full-frame details reveal the dark presence of GE300 Utah without hiding the maker’s marks.Its black grog sets it apart from many grogged stonewares on the market: it blends into the dark body instead of creating pale specks. Depending on firing temperature and cycle, Utah develops from metallic blue to black, with depth and reflections unique to each firing.
GE300 · Firing chart
Three temperatures. Increasing depth.
From 1,000 to 1,220°C, GE300 Utah gradually darkens: metallic blue gains density until it reaches near-black nuances. The black grog remains integrated within the body, reinforcing the unity of the surface.
Studio notes
Preparations and firing precautions · GE300
IMP denotes an ultrafine, flour-like grog that is almost imperceptible to the touch. It feels close to a smooth clay body without actually being one, and greatly reduces drying shrinkage.
CHF and CHM denote fine and medium grog respectively. Their particle sizes are detailed in the technical data sheet.
Characteristics are indicative. Always run your own forming, drying, firing and glaze-fit tests before production, and consult the safety data sheet.
Understand all preparations Back to topCompare clay bodies in this range
Compare colours, firing ranges and preparations. Read the technical data sheet for each reference before choosing.
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