Albany Slip
High iron silty low melting clay
Chemistry
|
Volatiles
|
Links to Other Materials
- Alberta Slip - Substitute
- Jasper Slip - Substitute
- Alberta Slip II - Substitute
- Arroyo Slip - Substitute
- Cache
Miscellaneous
- Family: Clay Other
- Region: North America
- Mined At: Unspecified
- Raw Mineral: No
- Generic: No
Notes
Albany was a low plastic silty clay that was mined in Albany, New York for many decades. It melts to a glossy chocolate brown glaze at cone 8-10. It was a very popular glaze ingredient for dark colors and tenmoku and iron crystal effects. In the early 20th century it was used extensively on heavy utilitiarian stoneware across North America and even on electrical insulators. Glazes could be formulated very easily using this material as a starting point since it was already balanced and had good slurry properties. Potters especially adopted this material and it appears in thousands of recipes used across North America.
There are a number of substitutes for Albany and anyone with ceramic chemistry calculation software can easily speculate on a mix of materials that matches the chemistry on paper. However keep in mind that judging the similarity to Albany is a complex issue of mineralogy, physical properties and chemistry and it depends on the reliability of the information at hand on what Albany actually was.
(Richard Willis)
A clay-rich earth, named for its mining location near Albany, New York, USA. Albany is a glacial clay, popular as a mid-fire hydrous alumino-silicate earth rich in alkalies and irons. Perhaps more popular as a slip for engobes or casting (owing to its relatively low-shrinkage character) than for wheel-throwing or hand-building, it is popularly added in small proportions to enhance most any glaze’s or clay’s viscosity. Similar products are mined around the world, and some claiming to be “substitutes” include the “Alberta” and “Jasper” slips.
Data
- Melting Point (MP): 1170C
- Sieve Analysis Wet
on 60 mesh: 0
on 120 mesh: 1.0%
on 200 mesh: 5% - Melting Point (MP): 1170C
Linked Articles
Duplicating Albany Slip
How Alberta Slip was created by analysing and duplicating the physical and chemical properties of Albany Slip
URLs
- Sheffield Slip substitute - http://www.sheffield-pottery.com/Albany_Slip_Substitute_and_Sheffield_Slip_s/189.htm
Authors
- Tony Hansen (Owner)
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="Albany Slip" descrip="High iron silty low melting clay" generic="0" rawmineral="0" searchkey="New York Slip, Albany Clay" loi="9.41">
<families>
<family name="Clay Other"/>
</families>
<regions>
<region name="North America"/>
</regions>
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="5.810" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="2.710" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="3.200" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.800" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.400" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="14.630" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="57.820" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="5.210" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="9.410" tolerance=""/>
</volatiles>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<notes>
<note>Albany was a low plastic silty clay that was mined in Albany, New York for many decades. It melts to a glossy chocolate brown glaze at cone 8-10. It was a very popular glaze ingredient for dark colors and tenmoku and iron crystal effects. In the early 20th century it was used extensively on heavy utilitiarian stoneware across North America and even on electrical insulators. Glazes could be formulated very easily using this material as a starting point since it was already balanced and had good slurry properties. Potters especially adopted this material and it appears in thousands of recipes used across North America.
There are a number of substitutes for Albany and anyone with ceramic chemistry calculation software can easily speculate on a mix of materials that matches the chemistry on paper. However keep in mind that judging the similarity to Albany is a complex issue of mineralogy, physical properties and chemistry and it depends on the reliability of the information at hand on what Albany actually was.</note>
<note>A clay-rich earth, named for its mining location near Albany, New York, USA.&nbsp; Albany is a glacial clay, popular as a mid-fire hydrous alumino-silicate earth rich in alkalies and irons. Perhaps more popular as a slip for engobes or casting (owing to its relatively low-shrinkage character) than for wheel-throwing or hand-building, it is popularly added in small proportions to enhance most any glaze’s or clay’s viscosity. Similar products are mined around the world, and some claiming to be “substitutes” include the “Alberta” and “Jasper” slips.</note>
</notes>
<testdata>
<testitem testname="4" value="1170C"/>
<testitem testname="4" value="on 60 mesh: 0
on 120 mesh: 1.0%
on 200 mesh: 5%"/>
<testitem testname="4" value="1170C"/>
</testdata>
</material>
Much more information with complete interlinking to many related Copyright 2003 http://digitalfire.com, All Rights Reserved Please support http://ceramicmaterials.info to improve this library |  |
INSIGHT is ceramic chemistry |