| Egyptian Journal of Archeological and Restoration Studies


EJARS (Established 2011)

Attention (Memorial Issue)!

EJARS will publish a special memorial issue for the late Prof. Mohamed Abdelhady, Professor of restoration for his praiseworthy efforts at developing the school of restoration in the Arab World, with Issue managers (Shaaban Abd El-Aal -- Smm00@fayoum.edu.eg), (Mohamed Abdel Wadood Abdel Azim -- Maa02@fayoum.edu.eg), (Walid Ali Mohammed Mahmoud -- walid.ali@fayoum.edu.eg) and (Hamada Sadek -- Hsr00@fayoum.edu.eg).

Volume 3 ,issue 2 | Summer and Autumn 2013 | Pages : 95-105

SPECTROSCOPIC INVESTIGATION ON PAINT LAYERS OF SABIL-KUTTAB UMM 'ABBAS CEILING, MOHAMMED ALI ERA IN CAIRO, EGYPT: IDENTIFICATION OF UNUSUAL PIGMENT AND MEDIUM

Document Type: Original article

DOI: 10.21608/EJARS.2013.7279

pages: 95-105

Authors:
Abdel-Ghani, M. 1 ; Mahmoud, M. 2

1 Lecturer, Conservation dept., Faculty of Archaeology, Cairo Univ., Giza, Egypt.
2 Supreme Council of Antiquities (SCA), Egypt

Abstract:
A comprehensive study has been undertaken into Sabil-Kuttab Umm 'Abbas ceiling (1867 AD/1284 H) in Cairo, Egypt. The study included both organic and inorganic constituents comprising; the pigments, the paint media, the gold layer and the white ground layer. The analytical instruments chosen for the study were Raman microscopy, Fourier transform infra red spectroscopy coupled with attenuated total reflection (FTIR-ATR) and optical microscopy. The pigments identified were ultramarine blue Na6[Al6Si6O24]Sn, indigo (C16H10N2O2), vermilion (á-HgS), red ochre (Fe2O3+clay+silica), barium white (BaSO4), lead white [2PbCO3. Pb(OH)2] and cobalt yellow (K3[Co(NO2)6]). The chromate mineral, hemihedrite (ZnPb10(CrO4)6(SiO4)2F2), was detected for the first time as an artistic pigment in this study. The paint media revealed were animal glue admixed with linseed oil and mastic resin. The detection of mastic resin as a paint medium in Egyptian paintings is of interest. The white ground layer was found to consist of calcium sulfate dihydrate (CaSO4.2H2O) and calcite (CaCO3) admixed with animal glue.

Keywords:
Sabil; Kuttab; Umm Abbas; Mohammad Ali Era; Raman spectroscopy; FTIR; Hemihedrite; Mastic

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