JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 64 No 4 (2019): Journal of the Chilean Chemical Society
Original Research Papers

RAMAN AND X-RAY FLUORESCENCE TO IDENTIFY COLORS OF THE GERMAN HYPERINFLATION STAMPS OF THE 1923 COLLECTION

Marcelo Campos-Vallette
Department of Chemistry, Facultad de Ciencias, Universidad de Chile
Bio
Published December 17, 2019
Keywords
  • Archaeophilately,
  • German hyperinflation postage stamps,
  • forgery,
  • Raman spectrum,
  • XRF,
  • β-naphthol azopigments,
  • Prussian blue,
  • crocoite,
  • zinc oxide
  • ...More
    Less

Abstract

Colors of a collection set of postage stamps dated 1923 and corresponding to the hyperinflationary period of the German economy were identifiedwith Raman and X-ray fluorescence (XRF) spectroscopies. Molecular systems associated to the blue, green and yellow colours were characterized. Blue colour is Prussian blue (Fe4[Fe(CN)6]3) and the green colour resulted to be a combination of Prussian blue and the yellow/orange pigment (PbCrO4) or a yellow β-naphthol like monoazopigment. The XRF data suggest that ZnO was used as filler.

GRAPH_9.jpg

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