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An infrared and SEM study of the margins of some german hyperinflation postage stamps

Authordc.contributor.authorGómez Jeria, Juan 
Authordc.contributor.authorClavijo Campos, Ernesto 
Authordc.contributor.authorCárcamo Vega, José 
Authordc.contributor.authorGutierrez, Sebastian 
Cita de ítemdc.identifier.citationResearch Journal of Pharmaceutical Biological and Chemical Sciences Volumen: 9 Número: 2 Páginas: 870-892es_ES
Abstractdc.description.abstractInfrared spectroscopy and scanning electron microscopy (SEM) studies were performed on the margins (the area without printed colors) of a set of German postage stamps dated 1923 and corresponding to the hyperinflationary period of economy. SEM results showed the presence of Al, Si, Zn and S in the samples, but in different combinations. Sulfur is considered to be a contaminant. The Al-Si combination is credited to kaolinite, Zn to ZnO and unaccompanied Al possibly to Al2O3. Several experimental IR bands of kaolinite agree with the suggestion of its existence in some stamps. In the case of Al and Zn alone we have supposed that, with the passing of time and with the help of moisture, AlOH and ZnOH were formed in a quantity allowing detecting some of the metal- OH bands by IR spectroscopy. On the basis of previous infrared experimental results on Al and Zn hydroxides we assigned some IR bands to the OH groups bonded to these metals. Our results indicate that it is highly probable that the paper used to print these postage stamps was originated in more than one paper mill.es_ES
Publisherdc.publisherRJPBCS Research Journal Pharmaceutical, Biological & Chemical Scienceses_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceResearch Journal of Pharmaceutical Biological and Chemical Scienceses_ES
Keywordsdc.subjectPostage stampses_ES
Keywordsdc.subjectInfrared spectraes_ES
Keywordsdc.subjectWhite zinces_ES
Keywordsdc.subjectScanning electron microscopyes_ES
Títulodc.titleAn infrared and SEM study of the margins of some german hyperinflation postage stampses_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile