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Ravenscrag Cone 6 High Alumina Matte

Code: GR6-F
Modification Date: 2016-09-30 22:40:47
Member of Group: RV6

Plainsman Cone 6 Ravenscrag Slip based glaze. It can be found among others at http://ravenscrag.com.

MaterialAmountPercent*Stat
Ravenscrag Slip60.056.1% 
Ferro Frit 313420.018.7% 
Dolomite10.09.3% 
Calcined Alumina10.09.3% 
Cobalt Oxide2.01.9%c
Rutile Ceramic5.04.7%v
 107.00  
* c-colorant, v-variegator, o-opacifier, s-suspender

Firing Schedule

Rate (F)Temp (F)Hold (Min)Step
100220601
300173302
1082175153
1502075304

Notes

This is a high alumina matte glaze and is a favorite. It is not temperature sensitive and produces good results at cone 5, 6 and 7 (medium blue surface breaking an olive type green where thin). Most base glazes do not host alumina well and fire with pitting and uneven surface (alumina is very difficult to melt and dissolve). Be sure to use a smallest particle sized alumina you can find (it is available in very fine grades, much finer that the average ceramic material).

Ravenscrag glaze on Plainsman M340

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By Tony Hansen

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