Cobalt Oxide Designer Silkscreens so make sure to test

so make sure to test the percentage that you add to a custom clay body

adding Frit 3134 to a recipe (to supply boron for example) does not require reduction of clay content

low alumina and boron leadless high expansion frit

In ceramic glazes it is used as a source of magnesia and calcia

While the glazed surface may pass leach tests

Cobalt Oxide Designer Silkscreens so make sure to testCobalt Oxide is a metallic coloring oxide that produces blue colors in glazes and is stable at all firing temperatures (unless in very high percentages where it will be black). Cobalt Oxide is the most powerful ceramic colorant and it appears in glaze recipes at 1% or less. Because cobalt oxide is not as finely powdered as cobalt carbonate, cobalt oxide is more likely to create blue specks in the glaze, a quality that we believe can be quite