Chrome-alumina pinks have metameric properties, making a shade appear different under different light conditions. It is therefore very difficult to obtain precise matchings with other types of pinks for identical shades under both natural and artificial illumination.
Chrome-alumina can produce a color range of peach through pink to bluish pink.
Excellent at firing temperatures up to 1300C with glazes having a high content of zinc oxide and alumina and a low content of lime. Should be fired in an oxidizing atmosphere.
Suitable for blending with all types of zircon based colors, tin-vanadium yellows and chrome browns. Blends with zircon-vanadium blues tend to produce shades of grey.
Note: This description is taken from information provided by Blythe Matthey and may or may not apply to stains of this family from other companies.
Chrome alumina colors are widely used as pink and pink-grey shades in the manufacture of glazed ceramic tiles fired in an oxidizing atmosphere to 1300C. For optimum color development and good surface finish, the glaze should have a high content of zinc oxide and alumina and a low lime content.
Not recommended as a body stain or underglaze color.
Glaze Color - Pink
According to Mason Color: This type of pigment requires the correct glaze chemistry in all temperature ranges, in order to maximize the "color value". High calcium content is most important, and zinc & magnesia must be low to zero. Boron should not be too high. A major complication is that these rules do not necessarily apply when "fast-firing" techniques are used. Second, these pigments need an oxidizing atmosphere throughout the firing cycle.
Out Bound Links