Lithopone

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Lithopone is a white pigment consisting of a mixture of barium sulfate and zinc sulfide. It is used in interior paints and in some enamels.[1] It is widely used for white paint.

History

It was manufactured by Krebs Pigments and Chemical Company and other companies.[2] The material came in different "seals", which vary in percent of zinc sulfide. Gold seal and Bronze seals contain 40-50% zinc sulfide, offering more hiding power and strength.[3][4]

Characteristics

It is a valuable pigment that is brilliant white with fine texture which is advantageous vs white lead.<ref name=O'Brian>W. J. O'Brien (1915). "A Study of Lithopone". Journal of Physical Chemistry 19: 113–144. doi:10.1021/j150155a002. </ref> It mixed well with oils such as linseed oil or varnish, turns grey very fast in sunlight and white again in the dark[citation needed].

References

  1. ↑ Gerhard Auer, Peter Woditsch, Axel Westerhaus, Jürgen Kischkewitz, Wolf-Dieter Griebler and Marcel Liedekerke "Pigments, Inorganic, 2. White Pigments" in Ullmann's Encyclopedia of Industrial Chemistry 2009, Wiley-VCH, Weinheim. doi: 10.1002/14356007.n20_n01
  2. ↑ "Krebs Pigment & Chemical Company". DuPont. Retrieved 2011-10-24. "Founded in 1902 by Henrick J. Krebs, Krebs Pigments and Chemical Company produced lithopone, a widely used white paint pigment also manufactured by DuPont. But Krebs' company had another asset of special interest to DuPont. ..." 
  3. ↑ Booge, J. E. (1929). Lithopone Composition and Process of Making Same. 
  4. ↑ Lithopone. 2010. 
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