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Chromium Oxide

Chromium Oxide Pigment Grade

Synonyms

Chromic oxide; Chrome oxide green; Chromium (III) oxide; Chromium sesquioxide; Chrome green; Chromium oxide green pigments; Dichromium trioxide; Chromia; Chromium (III) oxide; Anhydride Chromique (French); Casalis green; Chrome ochre; Chromia; Chromic acid green; Chromium oxide; C.I. 77288; Green Chrome Oxide; Green Oxide of Chromium; Green chromic oxide; Green chromium oxide; Green cinnabar; Green oxide of chromium

Specification

Model	CR-D
Cr2O3 Content%	99.2% min.
Hexavalent Chrome Content	10 ppm max
Oil Absorption (g/100g)	25 max.
Solution PH	5-8 max.
Water Soluble	0.4% max.
Residue on 325 Mesh	0.3% max.

Property

Chrome oxide is a green crystal powder, metal luster, magnetic, good covering strength, high temperature-resisting and sunlight fastness. Not soluble in water, barely soluble in acids, comparatively stable in air, unaffected by acids and alkalis of common density, sulfur dioxide, sulfur hydrogen etc. Chrome oxide green enjoys excellent quality and firmness of coloring.

Packing

Chrome Oxide is packed in 25kgs, 50kgs woven bags lined with PE liner or as request. 20-24MT will be loaded in per 20’FCL container.

Description

Chromium's name comes from the Greek word "chroma" which means "color." Some of the pigments are given below:

Chrome Yellow:

Chromium is used as a pigment in paint. The familiar yellow lines painted down the center of highways and the yellow paint used on school buses are often "chrome yellow" - a color produced from chromium pigment.

Other chromium-based pigments are chrome red, chrome oxide green, and chrome green, which are a mixture of chrome yellow and Prussian blue. Chromium oxide is used for imparting greenish color to glass. Chromium is an important pigment in many types of paint, ink, dye and cosmetics.

Chrome Green:

Chromium oxide gives green under most conditions. Amount upto 1% disperse and dissolve fairly easily and give bright greens in alkaline glazes, drab green in boron glazes and yellowish green in lead glazes. Quantity below 0.5% will give yellow in lead glazes. Amount upto a maximum of 3% give opacity and grayish green colors. The oxide powder is quite often quite a rich blue green color but it is impossible to keep this color in glazes without the assistance of cobalt oxide. Chromium oxide can also be used to stain slips and bodies. Amounts upto 5% gives different grey greens.

Chrome Red:

Small amount of chromium oxide dissolve well and give a bright red color below 900C in combination with lead oxide and silica. It is easy to product red and orange glasses for filling hollows in horizontally-fired tiles. The firing needs to be fully oxidized to achieve red color.

Chrome-Orange:

Small amount of chromium oxide dissolve well and give a bright red color below 900C in combination with lead oxide and silica. It is easy to product red and orange glasses for filling hollows in horizontally-fired tiles. The firing needs to be fully oxidized to achieve red color.

Chrome-Tin Pink

Chromium oxide also produces red in combination with tin oxide. Here the chromium oxide acts as a flux and enters a loose structure of the normally inert tin oxide. There is therefore no temperature limit with this combination. The resulting color is harsh crimson. Best Soft Pink is obtained by adding small amount of chromium oxide.

Trace amounts of chromium produce the color in many minerals and gemstones. The red color of ruby the pink of some sapphires and the green color of emerald are caused by tiny amounts of chromium