Starting with code beginning "P6984" L210 has a new recipe. The change was to remove the 10% talc that it formerly contained (we are removing talc from many other clay bodies also). You should not see an impact on glaze fit or fired color. The body remains highly plastic and very smooth. It is now also useful as a stoneware, firing stable in the cone 2-4 range.
FiringL210 fires to a light brown at cone 02-06. By cone 2 the color intensifies to a dense stoneware brown. Before cone 4 it is over fired. Like any other low-fire body at cone 06-04, L210 is fairly weak and has high porosity. But at cone 02 it is much stronger.
New 2022 L210 (left) vs. old version (right).
L210 fires to a light enough color that bright colored glazes should work well on it. Transparent glazes can be applied thinly to produce ultra clear results.
Although cannot guarantee that commercial glazes will not craze or shiver we do test multiple types for fit. Regarding toxicity: Do not assume food safety of brightly colored glazes in your kiln without a leach test (e.g. GLLE test). Consider using a transparent or white liner glaze for food surfaces.
Although commercial bottled products are expensive, they are convenient. It is practical to make your own dipping or brushing base glazes that dry faster and fit better (do not craze or shiver). Adding powdered stains is also possible. There is lots of documentation on how to make and mix our G1916Q and G3879 and recipes. Each of them has variations to enable tuning fit any body. It is possible to mix them as a brushing glaze, base coat or dipping glaze.
Spectrum 301 Majolica on L210 (thinner and thicker). L210 is an excellent clay for this glaze, we have noted no shivering or crazing. And the microsurface is more glassy and smooth than on L215 (plus it shivers on L215).
Drying Shrinkage: 7.0-8.0% Dry Strength: n/a Water Content: 22.0-23.0% Drying Factor: C130 Dry Density: n/a
Sieve Analysis (Tyler mesh):
+35: tr 35-48: tr 48-65: 0.1% 65-100: 3.5-4.5 100-150: 3.0-4.0 150-200: 4.5-5.5
Cone 06: 10-12% Cone 04: 8.0-10.0% Cone 02: 2.5-3.5 Cone 2: 0.5-1.5
Safety Data SheetClick here for web view.
|Plainsman Clays Ltd.|
702 Wood Street, Medicine Hat, Alberta T1A 1E9
Phone: 403-527-8535 FAX:403-527-7508