|Monthly Tech-Tip |
These two cone 10 porcelains have the same recipe. 50% Grolleg Kaolin and 25% each of silica and feldspar. But the one on the left is plasticized using 3.5% VeeGum T and the one on the right uses 5% regular raw bentonite. The VeeGum is obviously doing more than making it more workable, it is acting as a powerful flux and super-catalyst for translucency! Although not clear from this picture, the entire translucent mug is covered with blisters, it has over vitrified. This is another big benefit of VeeGum, its use in a porcelain enables cutting the amount of feldspar significantly (while retaining the translucency). This is good because it permits increasing the kaolin content for plasticity. Or increasing the silica for glaze fit.
A clay of incredibly small particle size. It has the highest plasticity of any known clay and acts as a suspending and gelling in slurries.