The quality painting of Paolo Rossini, Crucifixion with Mary Magdalene from the Church of the holy Three Kings in Brunk, was practically unknown to the public. Although the exact dating and circumstances of the formation of the painting are still unknown, the original signature "PAULUS ROSSINI / PINXIT VENETIIS", which can be seen at the right bottom part of the painting, indicates that it was painted by Paolo Rossini in Venice. The article presents new information about the author and the painting that have not been published yet.
COBISS.SI-ID: 515008383
In the chapter, three case studies are presented to discuss the capabilities and limitations of Raman mapping using motorised xy stage, giving results related to the production technologies of selected art objects and differentiation of original paint layers from those resulting from restoration interventions. Examples of in situ non-invasive mapping experiments in two easel paintings using a novel scanning method are also discussed, presenting organic pigments' distribution, as well as some of the paint application characteristics. The achievement is a result of collaboration with foreign project partners The Metropolitan Museum of Art and CNR-ISTM.
COBISS.SI-ID: 512739883
Non invasive reflection FTIR measurements provide valuable information about the chemical composition and degradation processes of the surface of works of art which is of a great importance in designing safe conservation-restoration interventions. However, band assignments and the identification of components can often be complicated by the fact that the IR reflection response of artworks’ surface is rather complex. A novel approach of μ-transflection analysis of artworks’ surface is presented, the technique that gives the opportunity to overcome the problems. In addition to the identification of the components present at the surface of the work of art, the technique can also be applied for monitoring of the chemical cleaning during the restoration processes. Some examples of the identification of the surface of a Baroque easel painting are presented.The achievement is a result of collaboration with the foreign project partner CNR-ISTM.
COBISS.SI-ID: 513036843
In the present work, a new substrate is proposed for the surface-enhanced Raman spectroscopy (SERS) analysis of samples, which are of cultural heritage importance. A new and simple procedure is presented for the preparation of a stable SERS-active substrate. It is based on the photoreduction of silver nitrate by ultraviolet light utilising hydroxypropyl cellulose as stabilising agent. The substrate’s characteristics were tested and compared with a known substrate: a citrate-reduced silver colloid, with alizarin as a reference material. Using the new substrate, it was possible to positively detect the organic dye alizarin red S, and two organic pigments: madder lake and alizarin crimson dark, as well as organic colourants prepared in paint layers with different organic binders without an interfering signal arising from the media, and without sample pre-treatment.
COBISS.SI-ID: 513147947
The presented study describes the deterioration of a traditional pigment, malachite [Cu2(CO3)(OH)2] in different binders, as a consequence of environmental effects acting on paint layers which were prepared according to traditional Baroque recipes. Malachite has often been reported to be very permanent in all binding media; however, investigations of aged and nonaged paint layers by means of Raman microscopy have shown instability of the carbonate part of the molecule, especially when malachite is present in an egg yolk medium. Decomposition of the pigment and the formation of degradation products such as copper oxide (tenorite—CuO) were observed. The possible formation of another copper oxide, paramelaconite—Cu4O3 was also taken into consideration. In order to obtain additional information on the degradation processes which affect malachite paint layers, supporting analytical methods, such as scanning electron microscopy and X-ray diffraction, were used.
COBISS.SI-ID: 513147691