Difference between revisions of "Brown chalk"
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== Description == | == Description == | ||
| − | An archaic common name for [ | + | An archaic common name for [[umber]], a dark brown earth pigment contains [[silica]], [[clay]], and a mixture [[Ferric hydroxide|iron hydroxide]] and [[manganese dioxide]]. The name brown chalk was used prior to the 1800s when chemical compound names were standardized (Schur 1985). |
== Additional Information == | == Additional Information == | ||
Revision as of 12:32, 9 January 2014
Description
An archaic common name for Umber, a dark brown earth pigment contains Silica, Clay, and a mixture iron hydroxide and Manganese dioxide. The name brown chalk was used prior to the 1800s when chemical compound names were standardized (Schur 1985).
Additional Information
S. Schur, "Conservation Terminology: A Review of Past & Current Nomenclature of Materials", Technology and Conservation, 1985.
Additional Images
Authority
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985