I have always been fond of the entire AMACO O-Series Opalescent Glazes. Bluebell was thoroughly enjoyable to experiment with. The glaze applies easily…smooth to brush on and relatively quick to dry. I’d seen some examples of Opalescents over Velvet Underglazes, so I definitely wanted to try that. I also wanted to try Brushing Bluebell over other glazes and experienced some success. Inadvertently, I applied bluebell over several dark glazes, and the results were lovely, but very subtle. What I was not expecting at all was the pleasant surprise of how BEAUTIFUL Bluebell is on Standard Mocha Clay. While neither the clay nor the glaze is speckled, somehow, the combination of the two results in a lovely and delicate sprinkle of granular cinnamon (see for yourself in the images below). Bluebell will definitely be taking its place in my “permanent collection” of glazes.
Although AMACO® Opalescent Glazes may be used on any clay, they develop their greatest opalescence and most interesting textures when applied over red clay bodies Most of the AMACO® Opalescent Glazes have a high gloss similar to mother-of-pearl. Best results are achieved with three or four applications of glaze. On textured ware, the glaze flows thin on relief and thick in incised areas, giving an added dimension on the surface.
The technique of utilizing a base layer of Velvet underglazes, covered with an Opalescent glaze, brings out the true beauty of the Opalescent glazes. The technique is simple yet offers some wonderful results. The process consists of making a form, which can be either vigorously and deeply carved, or very subtly carved, with a low fire clay that is bisque fired to cone 04. The bisque fired piece is covered with a single good coat of the Velvet underglaze of choice, coated with 3 coats of the Opalescent glaze and glaze fired to cone 05. It is that simple a process but the results are spectacular.
AMACO® Opalescent Glazes are supplied in liquid, ready-to-use form in pint jars. They are applied on a mature Cone 04 (1971°F, 1077°C) bisque by brushing, dipping, or pouring. On red bisque, these glazes should be applied rather heavily, and a slow rather than fast firing is best. Recommended temperature is Cone 05 (1911°F, 1044°C).