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Über Normalweiß

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Summary

Precipitation of bariumsulfate with carefully purified reactives under carefully controlled conditions to avoid any contamination, and pressing of this barite in chromium-plated moulds with a trace of gelatine yieldswhite standards of almost ideal properties: the high reflectance of ·991 varies only±0,002 throughout the visible spectrum and practically no gloss can be observed.

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References

  1. H. Lambert,Photometrie, Ostwald's Klassiker der exakten Wissenschaften (Leipzig 1892), § 725.

  2. Wilhelm Ostwald, Abh. math. physikal. Kl. Sächs. Ges. Wissenschaften, XXXIV, Nr. 3, S. 408 und ff. (1917); Physikal. Farbenlehre, (Verlag Unesma, Leipzig, 2. Auflage 1927) S. 62.

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  3. F. Mäder, Bull. Schweiz. Elektrotechn. Vereins 1947, Nr. 20. Herrn Dr.F. Mäder und Herrn Prof.König sei auch an dieser Stelle für die sorgfältige Ausführung der diffizilen Messung und die kritische Diskussion der Resultate herzlichst gedankt.

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  5. Das amerikanische Bureau of Standards empfichlt daher neuerdings sog. «working standards» aus weißem Glas, Proceedings of the O.S.A.

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Authors and Affiliations

  1. Forschungslaboratorien der Ciba Aktiengesellschaft, Basel

    K. Miescher & R. Rometsch

Authors
  1. K. Miescher
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  2. R. Rometsch
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Miescher, K., Rometsch, R. Über Normalweiß. Experientia 6, 302–304 (1950). https://doi.org/10.1007/BF02170907

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