Lincoln 60 Fireclay
Buff Firing Plastic Fireclay
| SADR - Sieve Analysis Dry |
+35 mesh: 3.5
35-48: 3.0
48-65: 4.0
65-100: 3.5
100-150: 3.5
150-200: 4.0
200-325: 5.0
|
| PCE - Pyrometric Cone Equivalent |
31 (claimed) |
| WABS - Water absorption |
Cone 6: 3.0%
Cone 7: 2.5
Cone 8: 1.5
Cone 10: 0.2 |
| FSHR - Firing Shrinkage |
Cone 6: 6%
Cone 7: 3%
Cone 8: 0.2%
Cone 10: 0% |
| DSHR - Drying Shrinkage |
5.5-6.0% @ 27% water |
Lincoln fireclay has a smooth and very pleasant feel and is used as a major ingredient in many commercial west coast USA stoneware and middle and high fire pottery clay and sculpture bodies.It provides excellent drying properties considering its high plasticity. It sieve analysis varies considerably by batch.
27% water is required to make the material plastic enough to work whereas a typical plastic pottery clay body is 20-22%.
Although this material is called a fireclay by many, it is not. It matures around orton 10, reaching zero absorption at that point.
The ZAM stoneware pottery clay body has been made for many years by various manufacturers on the west coast and it employs Lincoln. 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 fire clay
30 sand, all mesh
20 talc
Out Bound Links
In Bound Links
Pictures
Lincoln Fireclay test bars from cone 6-10 oxidation and 10 reduction
Lincoln 60 fired drying disk (cone 10R), this sample is vitrified
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Lincoln 60 Fireclay" descrip="Buff Firing Plastic Fireclay" searchkey="" loi="0.00" casnumber="70694-09-6">
<oxides>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="2.000" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="29.000" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="52.000" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="2.000" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="LOI" name="Loss on Ignition" percent="12.400" tolerance=""/>
</volatiles>
</material> | 
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