Stoneware Glaze fires to a higher temperature than Earthenware Glaze, so the colours are slightly more subdued as a result. Stoneware Glaze must be used on Stoneware Clay for functional pieces, such as cups, plates or bowls, as the combination of the Stoneware Clay and Glaze is the only way to guarantee it remains safe for use. Earthenware Glaze may be used on a Stoneware Body for pieces that are decorative only. Glaze fire to 1280-1300C. Colour: Clear Gloss.
Glaze on Glaze
Some glazes change hue and create exciting effects when applied in multiple layers or over other colours.
Experiment using two glazes. Apply two layers of each glaze to create your own unique colours and effects. Outcomes will depend on: the number and the order of layers, the colours used, and the colour of the clay body. Allow time to experiment and encourage students to share their results. Note that effects will become visible after firing.
This method is suitable for either Earthenware or Stoneware glazes – but do not use them together. Apply glazes to bisque fired clay, allowing each layer to dry between applications. Once layering is complete, kiln fire.
Bubble prints create wonderful patterns – but did you know you can also apply this fun and familiar technique to your clay projects?
In a plastic cup, combine Brush On Glaze (Earthenware or Stoneware) with water in 1:1 ratio, and add a dollop of dishwashing detergent – mix well. Using a clean straw, blow air continuously into the cup to create bubbles. Allow bubbles to overflow onto the clay surface. Do not over soak the clay (less is best). As the bubbles burst, the pattern will appear! Allow glaze to dry. This technique should be done on bisque fired clay.
Tip: If decorating air drying clay (Oz Clay), use Pigmented Inks instead of glazes.
This new Speckled Underglaze gives the unique effects of Raku with trachyte but can be applied on any clay body!
Contains elements of trachyte found in Buff Raku Trachyte clay that produces the unique speckled, textured effect. As trachyte can damage kiln shelves and contaminate future firings of white clays, people are often reluctant to use Raku clays. This underglaze provides the benefits of the textural effect without the kiln damage – as underglaze is not applied to the foot of artwork.
Apply a few coats to leather hard, bone dry or bisque fired clay. Once dry, use translucent Brush On Glazes over the top to add colour (Stoneware glazes work best or seal with clear glaze).
Zart Art School Catalogue page: 249