EP Kaolin
Plastic White Firing Kaolin
| PCE - Pyrometric Cone Equivalent |
35 |
A secondary water washed kaolin mined in Florida. It is fairly plastic and very white firing compared with most other American kaolins. It has excellent casting properties. It is not plastic enough for throwing bodies, thus it should be augmented by a more plastic kaolin or by a plasticizer like bentonite or hectorite.
EPK is considered by many to be the best North American kaolin for use in suspending glazes as it tends to produce a smooth thixotropic slurry. 15-20% will normally make the glaze gel slightly, thus when a piece is immersed in the slurry and removed it drips very little and the wet glaze layer stays in place for the time it takes to dewater. Since EPK is very close to theoretical kaolin chemistry, it will subsitute for any other kaolin that can make the same claim (e.g. Pioneer).
This material is mined and processed in Edgar Florida. It is extracted hydraulically (a high pressure stream of water is used to wash the clay/sand mix from the bank into a small lake). The slurry is pumped from the bottom and transported to vibrating screens that separate out the sand and grade it into sizes. The clay that passes the screens is pumped into a pond and settled with the aid of a flocculant. The slurry is then dried and the flocculant neutralized. The main product at this mine is high quality white sand, the clay is a byproduct. The company is confident that there are reserves for the next hundred years or more and the quality will be constant throughout the life cycle of the deposit.
Out Bound Links
- (Minerals - Contains)
Kaolinite
The most fundamental clay mineral. It is weathered... - (Materials - Related)
Edgar Glass Sand
- (Materials - Parent)
Kaolin - Al2O3.2SiO2 or Al2Si2O5(OH)4 - Hydrated alumina silicate, Pure clay mineral
China Clay
- (Hazards)
Kaolin
The hazards of using this material in the ceramic ... - (Typecodes - Type)
1: KAO - Kaolin
- (MDT)
Crystal Glazes
These materials are specially defined for makers o... - (MDT)
Ron Roy
This is the traditional Ron Roy materials file. He... - (MDT)
North America
The decision about what materials to include in th... - (MDT)
Latin and South America
Latin America and South America. We are working on... - (MDT)
Europe
Countries of Eastern Europe and former Soviet Unio... - (MDT)
Asia
All of Asia including Turkey, Russia, Indosnesia, ... - (MDT)
Africa
All of continental Africa. We are working on this ...
In Bound Links
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="EP Kaolin" descrip="Plastic White Firing Kaolin" searchkey="EPK, Edgar Plastic Kaolin, EPK Kaolin" loi="0.00" casnumber="95077-05-7">
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.180" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.100" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.330" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.060" tolerance=""/>
<oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.240" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.370" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="37.360" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="45.730" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="0.790" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="H2O" name="Water" percent="1.400" tolerance=""/>
<volatile symbol="LOI" name="Loss on Ignition" percent="13.200" tolerance=""/>
<volatile symbol="SO3" name="Sulfur Trioxide" percent="0.210" tolerance=""/>
</volatiles>
</material> | 
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