Since Cr2O3 becomes 2CrO3, oxygen is captured from the surroundings, thus the percentage (or conversion factor) is greater than 100. It cannot be used to make a metallic glaze.Ĭhrome Oxide Green is usually employed in raw glazes whereas potassium dichromate is used in fritted glazes. It is powerful, typically only 2% will produce a dark colour. It is also a flat colorant (due to its refractory nature), it usually produces an army helmet opaque green. As with other powerful colouring agents, chrome must be milled fine enough to eliminate specking in glass or glaze.Ĭhromium is a 'fast' colorant, meaning can produce strong green colours under all furnace conditions, slow or fast, reducing or oxidizing. It is manufactured from the mineral Chromite mined in southern Africa, Asia, Turkey and Cuba. It is a bright to dark green crystalline powder insoluble in alkalis and acids. Chrome oxide is the only stable oxide of the metal chromium. UNFORTUANETLY, WE WONT BE ABLE TO ASSIST IN ANY CLAIMS IF THERE IS DAMAGE IN TRANSIT, AS THIS IS OUT OF OUR CONTROL.Ĭhrome Oxide Green or Chromium Oxide is a very refractory ceramic colorant (even a 50% mix with a high borax frit will not even begin to melt it in a crucible). IF 6 OR MORE BAGS ARE ORDERED, WE CAN SHIP VIA A PALLET. THEY WILL NEED TO BE SHIPPED IN HEAVY DUTY PLASTIC BAGS. DUE TO CHANGES IN COURIER WEIGHT REGULATIONS, WE CAN NO LONGER SHIP 25KG BAGS IN A BOX AS IT IS OVER THE 25KG MAXIMUM SHIPMENT. Other articles where chrome oxide green is discussed: colour: Transition metal compounds: also known as the pigment chrome green, in which the relatively.
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