GA6-H - Alberta Slip Cone 6 Black

Modified: 2019-03-13 15:12:31

Pure Alberta Slip can be made into a black adding only 20% frit and 3% black stain

Material	Amount	Percent
Alberta Slip 1000F Roasted	33.00	35.5
Alberta Slip	40.00	43.0
Ferro Frit 3134	20.00	21.5
Added
Zircopax	4.00	4.30
Mason 6666 Black Stain	3.00	3.23
100.00		100

Notes

A glossy black. The small amount of frit needed is due to the fact that Alberta slip is a dark burning material already. If it is not black enough, increase the percentage of stain. If you need a glossier surface, increase the frit. If it crazes switch to Ferro Frit 3195. Should be ball milled.

For mixing instructions please see the master recipe, GA6-A.

Related Information

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This one inch tall mug was made using Alberta Slip plus 1% black stain and 20% frit 3134.

Ravenscrag Black on Plainsman M340

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Roasting Alberta and Ravenscrag Slips at 1000F: Essential for good glazes

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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.

Links

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-C - Alberta Slip Floating Blue Cone 6 Plainsman Cone 6 Alberta Slip based glaze the fires bright blue but with zero cobalt.
Recipes	GA6-G - Alberta Slip Lithium Brown Cone 6 Plainsman Cone 6 Alberta Slip based glaze.
Typecodes	Alberta Slip Glaze Recipes Alberta Slip is a substitute for Albany Slip that has gained a life of its own so that there are now many glazes based specifically on it.

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By Tony Hansen
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