In 2014, APUV team completed their fourth research expedition. In this case, the contact made with researchers of the University of Valencia in 2013 gave us the opportunity to collaborate with them working in the House of Ariadne (Regio VII, insula 4). This house is among the oldest and largest houses in Pompeii. It is also known as the House of the Colored Capitals, because it remains in a relative good conservation state almost all of its capitals. In this house remains of wall paintings from the third and fourth Roman style are present. During this field campaign thanks to our portable non-invasive instruments, we were able to characterize in-situ chemical transformations of certain pigments (white pigment transformation into black among others) and the composition of original mortars used for the construction of the house of Ariadna and those used in mural paintings. In this last case we aimed to combine the climatic monitoring performed by researchers of the University of Valencia with the chemical (elemental and molecular) information obtained by means of our non-invasive analyses and thermodynamic simulations. Apart from these two objectives, we focused also our attention in the characterization of possible pigment remains present in the columns (bases and capitals) of the peristyle from this house. Moreover, in the House of Ariadna, thereiss a warehouse where the paintings were biocolonized. Therefore, this area was also studied in-depth.
During our campaign the responsible of the Pompeii’s Applied Research Laboratory and the Soprintendenza Speciale Per I Beni Archaeologici Di Napoli E Pompei showed interest in our analytical methodology. Therefore, we were invited to visit the Pompeii’s Applied Research Laboratory. In our visit to this laboratory, placed inside the archaeological site of Pompeii, we were able to visit the large original raw pigment (inorganic and organic ones) collection stored in that laboratory. These pigments were recovered from the first excavation in Pompeii and since that they are stored and preserved. The responsible of this laboratory requested us to test if we were able to extract information about the composition of specific pigments from this collection. Thanks to this offer we were able to carry our portable Raman and ED-XRF instruments to this laboratory in order to perform some preliminary measurements of few pigments from this collection.
Thanks to the relation establish during our stay in Pompeii during 2014, after our field campaign in 2014 we continue our relationship with the Soprintendenza Speciale Per I Beni Archaeologici Di Napoli E Pompei and the Pompeii’s Applied Research Laboratory.