Sunday, 9 August 2009

Line Blend of KNO_MgO

This Line blend consists of Magnesium replacing Potassium and Sodium.Generally the Colour was muted and the surface moved from shiny opaque to very matt and opaque the colour decreased as the magnesium increased There was no Crazing present and the glaze had a thick glutanous and viscous surface. Magnesium has a low fluxing power and as the amount of MgO increased towards tile 7 the glaze melted less and had less tensile strength and started to flake off tiles 6 and 7,Could also be to do with less shrinkage as well as it has a low coefficient of expansion

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