Umber is a hydrated iron oxide that also contains significant manganese, calcia, alumina and silica. When umber is calcined (referred to as "burnt" because it is done to lower temperatures), the color intensifies. The material is used to color many products (e.g. for construction), in ceramics it is used to darken the fired color of clay bodies or engobes. Burnt umber can be any of a variety of natural and synthetic iron oxides (there are many manufacturers and choices, this is because the coloring market for cement, for example, is so large and widespread). A variety of impurities are common. Some companies condition the color of their umbers by adding various colors of iron oxide.
Burnt Umber
Burnt Umber
Clay & Minerals
Price:
$5.00
- SKU:
- RMUMBER
- Weight:
- 1.00 LBS
- Bulk Pricing:
- Buy in bulk and save
- Buy 5 - 9 and get $0.50 off
- Buy 10 - 24 and get $0.75 off
- Buy 25 - 49 and get $1.00 off
- Buy 50 or above and get $1.25 off
Bulk discount rates
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