Digitalfire Ceramic Materials Database

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Lincoln 60 Fireclay

Buff Firing Plastic Fireclay

Chemistry %

K2O	2.00
Al2O3	29.00
SiO2	52.00
Fe2O3	2.00

Volatiles %

LOI

12.40

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

(Materials - Related) Lincoln 8 Clay - Smooth plastic iron bearing fireclay
(Materials - Parent) Fireclay
Fire Clay
(Typecodes) 1: CLO - Clay Other
(Typecodes - Type) 1: FRC - Fireclay
(URLs - Related Information) ZAM clay body recipe
http://www.ceramicindustry.com/Articles/Feature_Ar...

In Bound Links

(Materials - Alternative) Imco 400 Fireclay - Fireclay

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>