Left: G2934 cone 6 matte glaze with 3% Mason 6300 blue stain. Right: An additional 4% tin added. The thickness of application is close to the same. Notice how an opacified color does not have depth and therefore is lighter in color. Also it does not break to different shades at the edges of contours the way the transparent color does.
Glaze opacity refers to the degree to which it is opaque. There is more than meets to eye to the subject of opacity control.
Ceramic stains are manufactured powders. They are used as an alternative to employing metal oxide powders and have many advantages.
Many ceramic glaze benefits and issues are closely related to the thickness with which the glaze is applied. Many glazes are very sensitive to thickness, so control is needed.
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