nice price BLUE SKY PIGMENT 250 GRAMS Using Pigments Use in concentrations of 10–15% in clay, using more or less depending on the intensity needed. Add the pigment to the slip and sieve through a 120x mesh screen to ensure adequate dispersion. When using pigments in glazes, usually in concentrations of 1–10%, a little more care must be taken because some pigment systems react with materials in a glaze. Some pigments are affected by the presence, or lack of, boron, zinc, calcium, and magnesia. While most pigments can be used in both oxidation and reduction atmospheres, some are limited to certain maximum temperatures. Testing and Safety When using pigments alone or in combination with other pigments and/or oxides, you’ll need to test them with the frit, glaze, and slip bases you intend to use. A good starting point is either using some of the published recipes or using frits. Because pigments are expensive to manufacture, their cost is higher than that of ceramic oxides