Digitalfire Ceramic Materials Database

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Plastic Vitrox

White Burning Plastic Feldspar

Chemistry %

CaO	1.00
MgO	0.50
K2O	5.00
Na2O	0.90
TiO2	0.10
Al2O3	12.70
SiO2	76.50
Fe2O3	0.50

Volatiles %

LOI

2.80

See PV Clay.

Richard Willis

A California feldspathic earth, usually packaged under the label PVC for “Plastic Vitrox Clay”, that is similar in makeup to Cornwall Stone but fires whiter. It is preferred by many for use in white clay or glaze formulas where kaolin or a “white clay” is called for.
Typical empirical analyses are SiO₂ 75.56%, Al₂O₃ 14.87%, Fe₂O₃ 0.09%, CaO 0.22%, MgO 0.20%, Na₂O 0.29%, K₂O 6.81% and CaO 1.00%, K₂O 5.00%, MgO 0.50%, Na₂O 0.90%, TiO₂ 0.10%, Al_2
>O₃ 12.70%, SiO₂ 76.50%, Fe₂O₃ 0.50%
A well-behaved casting slip for cone 8 or lower can be made of 1 part PV to 3 parts talc and 2 parts ball clay. A simple cone 6 glaze can be made of 1 part PV to 1 part borocalcite (2CaO.3B₂O₃_.5H₂O).

Out Bound Links

(Materials - Substitute) PV Clay - Al2Si2O5 (OH)4 - Plastic Feldspar
Plastic Vitrox, P.V. Clay
(Typecodes) 1: FEL - Feldspar
(MDT) Ron Roy
This is the traditional Ron Roy materials file. He...

In Bound Links

(Materials - Alternative) FC-1 Filler Clay

Pictures
PV Clay fired from cone 7-11 oxidation and 10 reduction.

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?>
<material name="Plastic Vitrox" descrip="White Burning Plastic Feldspar" searchkey="PV Clay, Plas Vitrox" loi="0.00" casnumber="12168-80-8">
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="1.000" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.500" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="5.000" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.900" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.100" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="12.700" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="76.500" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="0.500" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="LOI" name="Loss on Ignition" percent="2.800" tolerance=""/>
</volatiles>
</material>

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