Spectroscopic study of the coloring techniques used in Egyptian ceramics from the ptolemaic and roman period.

The manufacture of the Egyptian Faience through the periods of Ptolemaic and roman shows intense use of polychrome; our main concerns in this research are investigating the parameters controlling the blue color variation and the production of the apple green Faience. Archaeological faience samples belonging to the Ptolemaic and Roman periods representing various color hues were extensively studied using multiple spectroscopic techniques to explore the color palette of the Egyptian artist in this period and highlight the most significant features of their ways of coloring and fabrications. X-ray Fluorescence (XRF) and Scanning Electron Microscopy (SEM) results revealed quartz-rich body feature for all samples, with defined boundaries in some samples due to coloring techniques.