Alternate Names: Ferric Chromate, Chromite, Chromate of Iron
A dense compound of iron and chromium. It is very refractory in oxidation, even with 50% borax and zero-alumina Ferro frit 3134 it does not melt. It is used in glazes to produce gray (with feldspar), brown (with zinc), red (with tin) or black depending on the base glaze and percentage and other coloring oxides present. Often used in underglazes, engobes and clay bodies.
Highly toxic in absorption, inhalation, and ingestion.
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|Hazards||Iron oxide and Hematite|
|Hazards||Chromium Compounds Toxicology|
Metallic based materials that impart fired color to glazes and bodies.
|Frit Softening Point||1800C M|
|Density (Specific Gravity)||4.50|