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The Ravenscrag Slip based burgundy glaze on the outside of these mugs is made by fluxing Ravenscrag with 20% Ferro Frit 3134 and adding 10% Mason 6006 burgundy stain (actually these have a little less stain, about 8%). This stain works better than using raw chrome and tin. This glaze functions very well on porcelains and breaks white on the edges to highlight contours.
Ravenscrag Slip iron crystal glaze fired at cone 10R on porcelains. The recipe is simply 90% Ravenscrag Slip and 10% iron oxide.
Ravenscrag plus 10% iron oxide on the outside, Ravenscrag Slip plus 10% talc on the inside (GR10-J). Fired at cone 10 reduction.
|Materials||Ravenscrag Slip 1900F Calcined|
|Materials||Ravenscrag Slip 1000F Roast|
Concentrate on One Good Glaze
It is better to understand and have control of one good base glaze than be at the mercy of dozens of imported recipes that do not work. There is a lot more to being a good glaze than fired appearance.
Ravenscrag Slip is Born
The story of how Ravenscrag Slip was discovered and developed might help you to recognize the potential in clays that you have access to.
g2851H - Ravenscrag Cone 6 High Calcium Matte Blue
Plainsman Cone 6 Ravenscrag Slip based glaze. It can be found among others at http://ravenscrag.com.
GR10-A - Pure Ravenscrag Slip
Ravenscrag all by itself makes a great cone 10 reduction semi-gloss glaze. It also has great working properties.