Odenwalder Clay

Alternate Names: Oldenwaelder, Odenwälder

Description: High iron low melting clay

Oxide	Analysis	Formula
SiO2	58.40%	6.65
Al2O3	17.00%	1.14
TiO2	0.80%	0.07
Fe2O3	9.20%	0.39
CaO	1.00%	0.12
MgO	2.60%	0.44
K2O	5.70%	0.41
Na2O	0.20%	0.02
LOI	5.00%	n/a
Oxide Weight		649.66
Formula Weight		683.85

Notes

Mined in the south-western part of Germany, it is said to be excellent for brown slips and glazes.
Sometimes compared to Albany Slip however it has a little less fluxing oxides, higher Al₂O₃ and a higher iron content (their datasheet claims 3.3% porosity at cone 04 whereas Albany is close to 20%, 8.5% fired shrinkage whereas Albany is around 2.5%).

The analysis provided by Carl-jaeger.de added up to 101 without the LOI, we have scaled it back to 95 to allow for the LOI.

Particle size:
< 63 µm 96 %
< 40 µm 91 %
< 20 µm 82 %
< 10 µm 71 %
< 6 µm 61 %
< 2 µm 39 %
< 1 µm 30 %
< 0.5 µm 22 %
D 50 Wert 0,00 µm

Related Information

Links

Materials	Alberta Slip Albany Slip successor - a plastic clay that melts to dark brown glossy at cone 10R, with a frit addition it can also host a wide range of glazes at cone 6.
Materials	Albany Slip A pure low plasticity clay that, by itself, melted to a glossy dark brown glaze at cone 10R. It was a popular glaze ingredient for many decades.
Materials	Fremington Clay
Typecodes	Clay Other Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.

Data

Frit Softening Point	1170C

By Tony Hansen
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