Lincoln Fireclay
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| SiO2 | 58.20% | 3.71 | |
| Al2O3 | 26.60% | 1.00 | |
| Fe2O3 | 1.85% | 0.04 | |
| TiO2 | 1.65% | 0.08 | |
| LOI | 10.25% | n/a | |
| Oxide Weight | 338.59 | ||
| Formula Weight | 377.26 | ||
Notes
Lincoln Fireclay was a distinct clay from Lincoln 60 Clay. It was mined by North American Refractories and had more in common with Greenstripe Fireclay, which is currently mined from a pit near the same location as Lincoln Fireclay but is finer-grained.
The datasheet from North American Refractories shows:
Moisture Content: 15%
Water Plasticity: 29%
Drying Shrinkage: 6.0%
PCE: 31
Screen Residue:
-10-14 Mesh: 8%
-14-20 Mesh: 15%
-20-28 Mesh: 17%
-28-35 Mesh: 16%
-35-48 Mesh: 14%
-48-65 Mesh: 9%
-65 Mesh: 21
The ZAM stoneware pottery clay body has been made for many years by various manufacturers on the West Coast. It is:
15 Hawthorn Fireclay
10 Lincoln Fireclay
40 Goldart
15 Ball clay
10 Silica
7 Feldspar
3 Redart
8 Grog or Sand
Another example is Soldner's Raku, which is:
50 Lincoln Fireclay
30 Sand, all mesh
20 talc
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