Rock painting samples from Eritrean archaeological sites were studied by means of micro-Raman spectroscopy and proton-induced X-ray emission technique (PIXE). Hematite and manganese oxides/hydroxides were determined inr ed and black paints, respectively. Since colours do not contain carbon, the paintings cannot be dated with C-14. Moderate amounts of calcium carbonate or sulphate were also observed in most red drawings, while traces of phosphorus were found by PIXE only in a few red and black samples.
Characterisation of painting materials from Eritrea rock art sites with non-destructive spectroscopic techniques / Angela Zoppi; G. F. Signorini; F. Lucarelli; L. Bachechi. - In: JOURNAL OF CULTURAL HERITAGE. - ISSN 1296-2074. - STAMPA. - 3:(2002), pp. 299-308. [10.1016/S1296-2074(02)01234-7]
Characterisation of painting materials from Eritrea rock art sites with non-destructive spectroscopic techniques
ZOPPI, ANGELA;SIGNORINI, GIORGIO FEDERICO;LUCARELLI, FRANCO;
2002
Abstract
Rock painting samples from Eritrean archaeological sites were studied by means of micro-Raman spectroscopy and proton-induced X-ray emission technique (PIXE). Hematite and manganese oxides/hydroxides were determined inr ed and black paints, respectively. Since colours do not contain carbon, the paintings cannot be dated with C-14. Moderate amounts of calcium carbonate or sulphate were also observed in most red drawings, while traces of phosphorus were found by PIXE only in a few red and black samples.
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