| Monthly Tech-Tip  | No tracking! No ads!  | 
This mug has thin walls and was bisque fired to cone 04 (so it had a fairly porosity). As a result the glaze went on thinner when it was dipped. This was not evident at the time of glazing but at firing the thinner sections produced the brown areas.
| Recipes | 
GA6-C - Alberta Slip Floating Blue Cone 6
 Plainsman Cone 6 Alberta Slip based glaze the fires bright blue but with zero cobalt.  | 
| Glossary | 
Rutile Blue Glazes
 A type of ceramic glaze in which the surface variegates and crystallizes on cooling in the presence of titanium and iron (usually sourced by rutile)  | 
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