Visit the site ceramic-glazes.com for more information. Here you can see products made with the same materials. The pigments (underglazes) are manufactured using a high percentage of stain. This means they can be applied onto earthenware, greenware or bisque. They have the appearance of silk if left unglazed or will intensify in color when covered with a clear transparent or gloss glaze.
All pigments are intermixable so why not get creative and experiment by missing your own completely new color. During the firing process the colors fuse more vigorously creating purity, intensity and brilliance. The colors are stronger therefore less percentage is needed to create vivid colors making them extremely cost effective.
Usage
The pigments are powders. They should be mixed with a suitable medium (water) in the approximate proportions of 2 parts color to 1 part medium. These can be diluted further with water for brush application, immersion or flooding. After good drying, the products should be glazed with transparent (translucent) glaze and fire in the kiln at temperatures 950-1160°C (depends of material and glaze). You can use effect glazes in any combination with pigments.
Another way of use is mixing with transparent glaze to obtain different color glazes. The resulting color in this case is little bit milky.