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Roasted Alberta Slip (right) and raw powder (left). These are thin-walled 5 inch cast bowls, each holds about 1 kg. I hold the kiln at 1000F for 30 minutes. Why do this? Because Alberta Slip is a clay, it shrinks on drying (if used raw the GA6-B and similar recipes will crack as they dry and then crawl during firing). Roasting eliminates that. Calcining to 1850F sinters some particles together (creating a gritty material) while roasting to 1000F produces a smooth, fluffy powder. Technically, Alberta Slip losses 3% of its weight on roasting so I should use 3% less than a recipe calls for. But I often just swap them gram-for-gram.
Recipes |
GA6-C - Alberta Slip Floating Blue Cone 6
Plainsman Cone 6 Alberta Slip based glaze the fires bright blue but with zero cobalt. |
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Recipes |
GA6-G - Alberta Slip Lithium Brown Cone 6
Plainsman Cone 6 Alberta Slip based glaze. |
Recipes |
GA10-A - Alberta Slip Base Cone 10R
Alberta Slip at 60:40 calcine:raw makes a great tenmoku-like glaze at cone 10R |
Recipes |
GA10-B - Alberta Slip Tenmoku Cone 10R
You can make a tenmoku from Alberta Slip by adding only 2% iron oxide and 5% calcium carbonate |
Recipes |
GA10-D - Alberta Slip Black Cone 10R
You can make a black glaze at cone 10R using only 1% black stain in a 100% calcine:raw mix of Alberta Slip |
Recipes |
GA6-H - Alberta Slip Cone 6 Black
Pure Alberta Slip can be made into a black adding only 20% frit and 3% black stain |
Recipes |
L3341B - Alberta Slip Iron Crystal Cone 10R
By adding a little iron to 100% Alberta Slip you can make an iron crystal glaze. |
Recipes |
GA6-D - Alberta Slip Glossy Brown Cone 6
Plainsman Cone 6 Alberta Slip based glaze. It can be found among others at http://albertaslip.com. |
Recipes |
GR10-E - Alberta Slip:Ravenscrag Cone 10R Celadon
A celadon recipe affording slurry and fired properties control (because proportions of raw and calcined materials and frit can be adjusted) |
Recipes |
GA10x-A - Alberta Slip Base for cone 10 oxidation
Alberta Slip creates a glossy transparent brown at cone 10 with the simple addition of 10% frit. |
Recipes |
GA6-F - Alberta Slip Cone 6 Oatmeal
Plainsman Cone 6 Alberta Slip based glaze. It can be found among others at http://albertaslip.com. |
Recipes |
GA6-G1 - Alberta Slip Lithium Brown Cone 6 Low Expansion
Plainsman Cone 6 Alberta Slip based glaze. It can be found among others at http://albertaslip.com. |
Recipes |
GA6-A - Alberta Slip Cone 6 transparent honey glaze
An amber-colored glaze that produces a clean, micro bubble free transparent glass on brown and red burning stonewares. |
Recipes |
GA6-B - Alberta Slip Cone 6 transparent honey glaze
An amber-colored glaze that produces a clean, micro-bubble-free transparent glass at cone 5-6. Works well on brown and red burning stonewares. |
Materials |
Alberta Slip 1900F Calcined
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Materials |
Alberta Slip 1000F Roasted
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Materials |
Ravenscrag Slip
A light-colored silty clay that melts to a clear glaze at cone 10R, with a frit addition it creates a good base for a wide range of cone 6 glazes. |
Materials |
Alberta Slip
Albany Slip successor - a plastic clay that melts to dark brown glossy at cone 10R, with a frit addition it can also host a wide range of glazes at cone 6. |
Glossary |
Calcination
Calcining is simply firing a ceramic material to create a powder of new physical properties. Often it is done to kill the plasticity or burn away the hydrates, carbonates, sulfates of a clay or refractory material. |
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