Musivgold and Musivsilber
Musivgold (Latin: aurum mosaicum ), also Jewish gold , fake shell gold or porporina , is a historical name for a gold-colored material that was obtained by heating a mixture of tin amalgam , salmiak and sulfur and that mainly for the imitation gilding of works of art and the like Purposes by applying it with egg white or varnish . This false gold plating or fake bronze plating resists acids, fatty oils and hydrogen sulfide better than some bronze colors used later, which in turn have been replaced today by modern dyes.
Chemically , it is tin (IV) sulfide (SnS 2 ), which in its crystalline state consists of shiny gold flakes. These feel like talc between your fingers and can be applied in very thin layers. Tin (IV) sulfide is insoluble in water, is not attacked by hydrochloric acid or nitric acid , but dissolves in aqua regia and potassium hydroxide and sublimates partially undecomposed when heated.
Musivsilber , also known as Argentum musivum , was made from 3 parts tin, 2 parts bismuth , 4 parts mercury and egg white.
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- Musivgold. In: Brockhaus Bilder-Conversations-Lexikon, Volume 3. Leipzig 1839., pp. 225-226. At: Zeno.org
- Musivgold. In: Pierer's Universal Lexikon, Volume 11. Altenburg 1860, p. 584. At: Zeno.org
- Otto Dammer : Handbook of inorganic chemistry . F. Enke publishing house, Stuttgart 1903.
- Franz Erben: Poisonings, clinical part (manual of clinical expert activity, vol. 7). W. Braumüller publishing house, Leipzig 1909.
- Richard Krüger: Handbook of building materials theory . A. Hartleben Publishing House, Vienna 1899.
- E.-L. Judge: Musivgold (aurum mosaicum). In: Journal for Art Technology and Conservation, 1988, ISSN 0931-7198 .