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The ‘Tomb of the Philosophers’, owing its name to the iconographic theme depicted on the interior of its walls, offers a rare example of high-quality early Hellenistic painting, which enhances our knowledge on the use of painting materials and techniques in Greece during the late 4th–early 3rd century BC. The tomb was excavated in 2001 by the 17th Ephorate of Prehistoric and Classical Antiquities, in the area of the east cemetery of the ancient city of Pella and is among the largest built cist graves to have been found in the region to date. This article presents the results of a scientific investigation of the painting materials and techniques used in the tomb’s decoration by means of high-resolution visible- and raking-light imaging, broadband imaging (IRR, UIL, UVR, VIL), X-ray fluorescence spectroscopy and SEM-EDAX microanalysis on a representative number of samples. The examination of the paintings testifies to the application of elaborate painting techniques and to the use of a varied and rich chromatic ‘palette’ (iron oxides, Egyptian blue, malachite, conichalcite, cinnabar, lead white, carbon-based black, a purple organic colorant, yellow-orange arsenic and vanadium-based pigments). Furthermore, iconographic elements of the paintings were better visualized, allowing for a more accurate description and interpretation of the decorative program of the tomb.

During the Hellenistic period and under the growing influence of the art of painting, the polychromy of Greek terracotta figurines focused not only on an elaborate rendering of color, but also on the interplay of light and shadow. Some of the best-preserved examples clearly show the subtlety of such pictorial effects. Among them is a statuette of a standing Maenad, held in the collections of the National Archaeological Museum in Athens (inv. 5000). Dating back to 150–100 BCE, it is a high-quality testament to the sculptural, as well as pictorial, coroplastic production in the workshops of Myrina (Eolide, Turkey). Combining multi-scale examination, multi-spectral imaging and non-invasive spectroscopic investigations (XRF, FTIR, FORS), a scientific study of the artefact was carried out within the framework of the Pilina project, a collaborative research program between the Louvre, the C2RMF, the National Archaeological Museum and the French School in Athens. This article presents the main results of the study by discussing the color scheme, identification of some pigments and colorants (clays of the kaolinite group, ochres, cinnabar, Egyptian blue, an anthraquinone of plant origin, likely madder, gold leaf), and painting techniques aiming at achieving chiaroscuro effects.

Cuprorivaite (CaCuSi4O10, also known as Egyptian blue) exhibits an exceptionally high emission quantum efficiency in the near-infrared region (λmax= 910 nm, ΦEM= 10.5%) and a long excited state lifetime (107 μs); these properties make it appealing for several applications in the fields of biomedical analysis, telecommunications and lasers. [ABSTRACT FROM AUTHOR]