Difference between revisions of "Freeman's white lead"
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== Description == | == Description == | ||
| − | A composite white pigment patented by Joseph Freeman in 1882 in England. Freeman's white lead was originally described as a mixture of [ | + | A composite white pigment patented by Joseph Freeman in 1882 in England. Freeman's white lead was originally described as a mixture of [[lead sulfate]] and [[zinc white]] ground under high pressure. In a later patent for an improved white pigment, Freeman added [[barium sulfate]] to the mixture. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 14:19, 15 January 2014
Description
A composite white pigment patented by Joseph Freeman in 1882 in England. Freeman's white lead was originally described as a mixture of Lead sulfate and Zinc white ground under high pressure. In a later patent for an improved white pigment, Freeman added Barium sulfate to the mixture.
Synonyms and Related Terms
permanent white lead; leaded zinc oxide; leaded zinc white
Additional Information
M-C. Corbeil, P.J. Sirois, E.A. Moffatt, "The use of a white pigment patented by Freeman by Tom Thomson and the Group of Seven" preprints ICOM, Lyons, 1999. p369.
Authority
- M. Doerner, The Materials of the Artist, Harcourt, Brace & Co., 1934
- 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