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Alberta Slip Cone 5 Reduction Base Glaze

Code: GA6-A
Modification Date: 2015-10-30 18:58:31
Member of Group: ASR6

The same 80:20 Alberta Slip:Frit base recipe that works at cone 6 oxidation also works in reduction

MaterialAmount
Alberta Slip Calcined40.0
Alberta Slip40.0
Frit 313420.0
 100.00  

Notes

GA6-A at cone 5R on Plainsman M370, M350

GA6-A at cone 5R on Plainsman M370, M350

GA6-A is Alberta Slip raw:calcine mix with 20% frit 3134.

GA6-A at cone 5R on Plainsman M370, M350

Ravenscrag Slip GR6-A (20% frit 3134) and Alberta Slip GA6-A (20% frit 3134) glazes on M340 at cone 5 reduction.

GA6-A at cone 5R on Plainsman M370, M350

GA6A glaze fired at cone 5R on Plainsman M350 and M340.

GA6-A at cone 5R on Plainsman M370, M350

GA6A glaze (Alberta Slip 80%, Frit 3134 20%) at cone 5R (left) and pure Alberta Slip at cone 10R (right).

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.


By Tony Hansen

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