Magma was developed to create a rough, cratered surface. The thicker the application, the more textured the surface will be. Magma can be directly applied to bisqueware or in combination with other mid-range glazes. The amount of dimension and cratering created with these glazes is directly a result of how thick the glaze is applied. A thinner application will produce a less dimensional surface with minimal cratering. It will have more of a sandpaper feel. A thicker application will produce a more dimensional and cratered surface.

Chips shown are fired flat on a white clay body fired to cone 6 oxidation and cone 10 reduction. The choice of clay body, the thickness of glaze application, the firing process, and temperature will affect the fired results.