lithopone
1
[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]
] CharacteristicsIt is a valuable pigment that is brilliant white with fine texture which is advantageous vs white lead.[5] 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^ 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^ "Krebs Pigment & Chemical Company". DuPont. http://www2.dupont.com/Heritage/en_US/related_topics/krebs_pigment_chemical_company.html. 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. ..." ^ Booge, J. E. (1929). Lithopone Composition and Process of Making Same. ^ Lithopone. 2010. ^ W. J. O'Brien (1915). "A Study of Lithopone". Journal of Physical Chemistry 19: 113–144. doi:10.1021/j150155a002.1.
ITEM | Specification | |
B311 | B301 | |
Total Zinc and Barium Sulphate %≥ | 99.0 | 99.0 |
Zinc Sulfide Content %≥ | 30.0 | 28.0 |
Zinc Oxide Content %≤ | 0.3 | 0.6 |
Tinter Reducing Power, Compared with Standard Samples ≥ | 105 | 100 |
105°C Volatile matter %≤ | 0.3 | 0.3 |
Water solubles %≤ | 0.3 | 0.4 |
Water suspension Ph-value | Neutral | 6.0-8.0 |
Oil absorption,g/100g≤ | 6.0-8.0 | 14 |
Residue on sieve 45um %≤ | 5 | 5 |
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Hight Hiding Tinting Strength Lithopone