Why does VC71 not cutlery mark when it is barely melting?


Thursday 30th October 2014

Left: VC71 cone 6 silky insight-live.com/glossary/130">matte glaze. Right: An adjustment that adds boron melter and SiO2/Al2O3 (which preserves their ratio). The dramatic improvement in melting was unexpected. Even though B has the same Si:Al ratio, it is completely glossy. Why? A (left) is simply not melting completely, that is why it is silky matte (not a true matte). Yet it feels like a good silky matte and is resistant to cutlery marking. Why? Touch alone can be misleading. Cutlery marking usually happens with matte glazes or heavily opacified whites, this is neither, it is an under-fired glossy glaze, fired just high enough not to mark.

Pages that reference this post in the Digitalfire Reference Library:

Is the V.C. 71 pottery glaze a true matte? , Two matte mechanisms: One crazes the other does not, Cutlery Marking


This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.