To use all functions of this page, please activate cookies in your browser.
my.chemeurope.com
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
Umber
Additional recommended knowledgeUmber is a natural brown clay pigment which contains iron and manganese oxides. The color becomes more intense when calcined (heated), and the resulting pigment is called burnt umber. The name derives from Umbria,[citation needed] a mountainous region of central Italy, but it is found in many parts of the world. Some of the finest umber comes from Cyprus. It has been used as a pigment since prehistoric times. Chemical formula: Fe2O3 + MnO2 + nH2O + Si + Al2O3 See alsoCategories: Iron oxide pigments | Iron minerals | Manganese minerals | Oxide minerals |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Umber". A list of authors is available in Wikipedia. |