The triaxial blend is a method used by potters to mix three glaze ingredients or three known glazes together in varying amounts to create a new glaze or test the eutectic of potential glaze ingredients. The materials Neph Sy, Grolleg Kaolin and Dolomite were chosen for this test. To make this blend fifteen empty cups and fifteen numbered test tiles were lined up in a triangle shape. Then, starting at each corner of the triangle, tablespoonfuls of the three glaze ingredients were added to each cup in a known amount. The corner cup was 100% of the starting ingredient, each cup on the second layer was given three tablespoons of that ingredient, then two on the next level, then one on the next. The final level of the triangle did not receive any of the first ingredient but was filled by the other two ingredients which were added in a similar fashion.
Once the cups had been filled a small amount of water was added until a cream-like slurry was achieved. This mixture was then brushed onto the test tile corresponding to the cup. Once all of the tiles were glazed they were placed on wasters and fired to cone six.
After firing, the results were evaluated and the fifth test tile was chosen as the best candidate for further exploration. This tile contained approximately 60% Neph Sy, 20% Grolleg Kaolin, and 20% Dolomite which yielded a buttery satin glaze. It was noted that all of the tests contained a large amount of crazing so it was decided that the blend would most likely need additional silica to alleviate this problem.
Neph Sy 60