The Effect of Preservative Interventions on the Chemical- Physical and Structural Characteristics of Panel Painting

This work studies the impact of two traditional Romanian treatments, Red Petroleum and Propolis, in terms of real efficiency and consequence on the wooden artifacts. The application of these solutions is still a widely adopted and popular technique in preservative conservation but the impact of these solutions is not well known. It is important to know the effect of treatments on chemical-physical and structural characteristics of the artifacts, not only for understanding the influence on present conditions but also for foreseeing the future behavior. These treatments with Romanian traditional products are compared with a commercial antifungal product, Biotin R, which is utilized as reference to control the effectiveness of Red Petroleum and Propolis. Red Petroleum and Propolis are not active against mould while Biotin R is very active. Mould attack is mostly concentrated in the painted layer, where the tempera, containing glue and egg, enhance nutrition availability for moulds. Biotin R, even if is not a real insecticide but a fungicide, was the most active product against insect attack of the three products, followed by Red Petroleum, Propolis and untreated reference. As for colour, it did not change so much after the application of Red Petroleum and Biotin R and the colour difference was almost not perceptible. On the contrary, Propolis affected the colour a lot. During the exposure at different RH, the colour changes significantly at 100% RH at equilibrium and this is mainly due to the mould attack. Red Petroleum penetrates deeply into wood, while Propolis does not penetrate and remains only on the surface. However, Red Petroleum does not interact chemically with wood substance and it is easy volatilized in oven-dry condition. On the contrary Propolis interacts chemically with wood substance and hardly volatilized, even in oven-dry condition and consequently Propolis remains where it penetrated, mostly on the surface. Treatment by immersion has impact on wood physical parameters while treatment by brushing does not have significant impact. Especially Red Petroleum has an apparent impact on moisture content (MC) due to the penetration of solution, while Propolis does not penetrate so much and remains only on surface therefore Propolis does not have so much impact as Red Petroleum. However, if the weight of the solution penetrated in wood is eliminated, there is not significant difference in MC between treated and untreated samples. Considering physical parameters, dimensional stability is an important parameter. The variation of wood moisture content causes shrinkages/swelling of the wood that polychrome layer can only partially follow. The dimension of wooden supports varied under different moisture conditioning; the painted layer cannot completely follow this deformation, and consequently a degradation and deterioration caused by detachment, occurs. That detachment affects the polychrome stratification of the panel painting and eventually the connections between the different layer compositions of the panel painting.

La "barbarie glorieuse" pendant la Renaissance européenne

The thesis deals with the notion of "barbarian/barbarism" from Greek and Roman antiquity to the European Renaissance history and theatre. From a methodological point of view, though the notion of "barbarian" is analysed from an interdisciplinary perspective, the hermeneutic approach of the history of ideas and New Historicism are privileged. The main idea of the thesis is that during the XVIth century in Europe the interpretation of barbarism as a historical and cultural event has shifted from a negative position to a more positive one. The idea of “glorious barbarism” tries to explain such a change in European thought. The thesis is divided into four chapters. In the first chapter the notion of barbarism is analysed from Greek and Roman antiquity to the Renaissance. The second chapter deals with the development of cartography during the XVIth century in Europe and its relation to the redefinition of Europe’s borders. This chapter also deals with the study of some European political treatises developing a reflection on the barbaric past of Europe. The third chapter deals with the analysis of European XVIth century theatre and its relation to the representation of barbarism, with particular attention to Italian, English and Spanish plays staging a conflict between civilization and barbarism. Finally, the forth chapter deals with the analysis of the myth of Amazons during the XVIth century both in the arts and in literature. The Amazons are interpreted as the female translation of the figure of the barbarian. This cultural, artistic and political process emerges particularly in representation of female characters in European XVIth century theatre.