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Alberta Slip Cone 6 Black

Code: GA6-H
Modification Date: 2015-10-30 18:55:03
Member of Group: AS6

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

MaterialAmountUnits
Alberta Slip Calcined33.0g
Alberta Slip40.0kg
Ferro Frit 313420.0g
Additions
Zircopax4.0g
Mason 6666 Black Stain3.0g

Alert: This recipe contains units of measure, it cannot be imported into Desktop Insight as is.
You must recalcuate it to percentages and then to the total you need (if it has not be done here).

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. 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

Calcining Alberta Slip

Calcining Alberta Slip

Calcined Alberta Slip (right) and raw powder (left). These are just 5 inch cast bowls, I fire them to cone 020 and hold it for 30 minutes. Why calcine? Because for glazes having 50% or more Alberta Slip, cracking on drying can occur, especially if it is applied thick (Alberta Slip is a clay, it shrinks). I mix 50:50 raw:calcine for use in recipes. However, Alberta Slip has an LOI of 9%, so I need to use 9% less of the calcine powder (just multiply the amount by 0.91). Suppose, I needed 1000 grams: I would use 500 raw and 500*.91=455.

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By Tony Hansen

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