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Cerdec/Degussa Encapsulated Stains

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In the past, stable red stains at high firing temperatures were unknown to the ceramic industry. This gap was bridged by Degussa’s line of inclusion pigments which are stable up to a firing temperature of 1300˚C (2372˚F) and which are resistant to unfavorable kiln atmospheres.
Stains can be used to color clay bodies, slips, or glazes. They can be mixed with water or with frits and brushed onto pottery forms, either over or under a glaze. They are fritted to insure color consistency from batch to batch. The fired color should be almost identical to the stain in its raw state. Stains will vary in color, however, depending upon the medium into which they are mixed and firing temperature.

Basically
The more stain you add, the darker the color will be.

Stains in Clays and Slips
Best results can be expected when stains are added to a white clay body or slip base. Fire to normal maturation temperature. Percentages of stain added to clay or slip should be determined by testing.

Stains in Glazes
Stains can be used to color either transparent or opaque base glazes. Stains are generally added in amounts ranging from 1-10% of the glaze batch. The higher the percentage of stain, the deeper the fired color will be. The base glaze should contain a calcium carbonate content of 12-15% and have no zinc. Zinc can adversely affect colors, especially chrome-tin pinks, vanadium yellows, and cobalt blues. The percentage of stain plus opacifier should equal 15% of the total glaze batch.

Stains in Frit
Instead of using a glaze, you can add stains to water and FRIT. FRIT is a powdered combination of ingredients that basically makes up a very simple glaze. It allow a little "melt" to occur, which will bind the mason stains to the clay when fired. 

Please make your own tests to determine the suitability of such products for their particular purposes.
All colors are as accurately represented as the RGB display process will allow.

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