Firered

Plainsman Native Clay

Chemistry

BaO	0.300
CaO	0.500
K2O	1.100
MgO	0.600
Na2O	0.100
TiO2	0.900
Al2O3	15.400
P2O5	0.200
SiO2	66.300
Fe2O3	6.900
MnO	0.100

Volatiles

LOI

7.600

Links to Other Materials

M2 Red Stoneware - Ingredient Of
A1 BALL CLAY - Ingredient Of
Saint Rose Red - Ingredient Of
Plainsman Red Fireclay - Unspecified
Newman Red Clay - Alternative
Cache

Miscellaneous

Family: Clay Other
Region: North America
Mined At: Unspecified
Raw Mineral: No
Generic: No

Notes

A natural, high iron, high temperature stoneware clay blend of a refractory low plastic red clay, a medium temperature medium plastic red clay and a bentonitic ball clay. Firered has medium plasticity and is thus a plasticity nuetral additive to clay bodies. It is slightly sandy and by itself is a deep, solid red at cone 10R with speckle. It is stable to cone 12+. This material is a better choice for impart red color to medium and high temperature bodies than typical low fire red clays (the latter tend to flux to brown rather than red colors even in bodies with low feldspar).

This material is a possible alternative to Newman red fireclay with caveats.
-This material is more plastic (thus ball clay or bentonite in the recipe can be reduced to compensate)
-FireRed is a little more vitreous (thus feldspar can be reduced).
-FireRed has a much coarser particle size distribution so homogeneous red burning bodies will look less so and they will have a much more toothy feel.
-FireRed has less staining power, you may need to augment it with iron oxide.

Fired Temperature, Cone 6 7 8 9 10 11 10R
--------------------------------------------
Fired Shrinkage: 3.2% 3.4% 3.6% 3.6% 3.7% n/a n/a
Absorption: 8.2% 8.0% 7.8% 7.5% 7.1% n/a n/a
Fired Strength:
(lbs/ square inch) 3800 4200 4300 4300 4300

Sieve Analysis Wet Washed
(Root of 2 series) +35 +48 +65 +100 +150# +200 +325
--------------------------------------------
0.1% 0.5% 2.5% 5.0% 6.0% 11.0% 11.0%

Texture: Sl. tooth
Plastic Index (1-10): 5
Green Strength (lbs/sqaure inch): 800
Dry shrinkage: 5.5
Dried density: 2.06
PCE: 16.5

Data

Melting Point (MP): PCE 17
Firing Shrinkage
Cone 4: 3.0-4.0%
Cone 6: 3.5-4.5
Cone 8: 4.0-5.0
Cone 10: 4.5-5.5
Cone 10R: 3.0-4.0
Drying Shrinkage: 6.0-7.0
Sieve Analysis Dry
+48 mesh: 0.5-1.0%
48-65: 2.0-4.0
65-100: 3.0-5.0
100-150: 4.0-6.0
150-200: 5.0-7.0
200-325:
Water absorption
Cone 4: 9.0-11.0%
Cone 6: 7.5-9.5
Cone 8: 6.0-8.0
Cone 10: 5.0-7.0
Cone 10R: 2.0-3.0
Melting Point (MP): PCE 17
Firing Shrinkage
Cone 4: 3.0-4.0%
Cone 6: 3.5-4.5
Cone 8: 4.0-5.0
Cone 10: 4.5-5.5
Cone 10R: 3.0-4.0
Drying Shrinkage: 6.0-7.0
Sieve Analysis Dry
+48 mesh: 0.5-1.0%
48-65: 2.0-4.0
65-100: 3.0-5.0
100-150: 4.0-6.0
150-200: 5.0-7.0
200-325:
Water absorption
Cone 4: 9.0-11.0%
Cone 6: 7.5-9.5
Cone 8: 6.0-8.0
Cone 10: 5.0-7.0
Cone 10R: 2.0-3.0

URLs

Data Sheet - http://digitalfire.com/plainsman/data/firered.htm

Suppliers

Plainsman Clays

Authors

Tony Hansen (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="Firered" descrip="Plainsman Native Clay" generic="0" rawmineral="0" searchkey="Plainsman FireRed" loi="0.00">
<families>
<family name="Clay Other"/>
</families>
<regions>
<region name="North America"/>
</regions>
<oxides>
<oxide symbol="BaO" name="Barium Oxide, Baria" status="" percent="0.300" tolerance=""/>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.500" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.600" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="1.100" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.100" tolerance=""/>
<oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.200" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.900" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="15.400" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="66.300" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="6.900" tolerance=""/>
<oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.100" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="7.600" tolerance=""/>
</volatiles>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<suppliers>
<supplier name="Plainsman Clays" country="CA" url="http://www.plainsmanclays.com" label=""/>
</suppliers>
<notes>
<note>A natural, high iron, high temperature stoneware clay blend of a refractory low plastic red clay, a medium temperature medium plastic red clay and a bentonitic ball clay. Firered has medium plasticity and is thus a plasticity nuetral additive to clay bodies. It is slightly sandy and by itself is a deep, solid red at cone 10R with speckle. It is stable to cone 12+. This material is a better choice for impart red color to medium and high temperature bodies than typical low fire red clays (the latter tend to flux to brown rather than red colors even in bodies with low feldspar).

This material is a possible alternative to Newman red fireclay with caveats.
-This material is more plastic (thus ball clay or bentonite in the recipe can be reduced to compensate)
-FireRed is a little more vitreous (thus feldspar can be reduced).
-FireRed has a much coarser particle size distribution so homogeneous red burning bodies will look less so and they will have a much more toothy feel.
-FireRed has less staining power, you may need to augment it with iron oxide.

Fired Temperature, Cone 6 7 8 9 10 11 10R
--------------------------------------------
Fired Shrinkage: 3.2% 3.4% 3.6% 3.6% 3.7% n/a n/a
Absorption: 8.2% 8.0% 7.8% 7.5% 7.1% n/a n/a
Fired Strength:
(lbs/ square inch) 3800 4200 4300 4300 4300

Sieve Analysis Wet Washed
(Root of 2 series) +35 +48 +65 +100 +150# +200 +325
--------------------------------------------
0.1% 0.5% 2.5% 5.0% 6.0% 11.0% 11.0%

Texture: Sl. tooth
Plastic Index (1-10): 5
Green Strength (lbs/sqaure inch): 800
Dry shrinkage: 5.5
Dried density: 2.06
PCE: 16.5</note>
</notes>
<testdata>
<testitem testname="5" value="PCE 17"/>
<testitem testname="5" value="Cone 4: 3.0-4.0%
Cone 6: 3.5-4.5
Cone 8: 4.0-5.0
Cone 10: 4.5-5.5
Cone 10R: 3.0-4.0
"/>
<testitem testname="5" value="6.0-7.0"/>
<testitem testname="5" value="+48 mesh: 0.5-1.0%
48-65: 2.0-4.0
65-100: 3.0-5.0
100-150: 4.0-6.0
150-200: 5.0-7.0
200-325:"/>
<testitem testname="5" value="Cone 4: 9.0-11.0%
Cone 6: 7.5-9.5
Cone 8: 6.0-8.0
Cone 10: 5.0-7.0
Cone 10R: 2.0-3.0"/>
<testitem testname="5" value="PCE 17"/>
<testitem testname="5" value="Cone 4: 3.0-4.0%
Cone 6: 3.5-4.5
Cone 8: 4.0-5.0
Cone 10: 4.5-5.5
Cone 10R: 3.0-4.0
"/>
<testitem testname="5" value="6.0-7.0"/>
<testitem testname="5" value="+48 mesh: 0.5-1.0%
48-65: 2.0-4.0
65-100: 3.0-5.0
100-150: 4.0-6.0
150-200: 5.0-7.0
200-325:"/>
<testitem testname="5" value="Cone 4: 9.0-11.0%
Cone 6: 7.5-9.5
Cone 8: 6.0-8.0
Cone 10: 5.0-7.0
Cone 10R: 2.0-3.0"/>
</testdata>
</material>

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