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Alberta Slip Cone 6 Black

Code: GA6-H
Modification Date: 2018-06-11 23:29:43
Member of Group: AS6

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

Alberta Slip 1000F Roasted33.0
Alberta Slip40.0
Ferro Frit 313420.0
Mason 6666 Black Stain3.0


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.

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

Ravenscrag Black on Plainsman M340

Roasting Alberta Slip at 1000F

Roasting Alberta Slip at 1000F

Roasted Alberta Slip (right) and raw powder (left). These are thin-walled 5 inch cast bowls, each holds about one kg. I hold the kiln at 1000F for 30 minutes. Why do this? Because Alberta Slip is a clay, it shrinks on drying. Roasting eliminates that, a 50:50 raw:roast mix works well for most recipes having high percentages of Alberta Slip. And 1000F? Calcining to 1850F sinters some particles together (creating a gritty material) while 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.

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<recipe name="Alberta Slip Cone 6 Black" keywords="Pure Alberta Slip can be made into a black adding only 20% frit and 3% black stain" id="36" date="2018-06-11" codenum="GA6-H" altcodenum="G2863">
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<recipeline material="Alberta Slip" amount="40.000" unitabbr="g" conversion="0.0010" added="0"/>
<recipeline material="Ferro Frit 3134" amount="20.000" unitabbr="g" conversion="0.0010" added="0"/>
<recipeline material="Zircopax" amount="4.000" unitabbr="g" conversion="0.0010" added="1"/>
<recipeline material="Mason 6666 Black Stain" amount="3.000" unitabbr="g" conversion="0.0010" added="1"/>
<url url="" descrip="Recipe page at"/>

By Tony Hansen

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