The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. http://http://dspace.unitus.it:80 2013-06-20T04:45:43Z 2013-06-20T04:45:43Z Pelosi, Claudia Santamaria, Ulderico Morresi, Fabio Agresti, Giorgia De Santis, Alberto Mattei, Elisabetta http://hdl.handle.net/2067/1323 2011-03-18T01:30:43Z 2007-08-31T22:00:00Z

Title: I gialli di piombo, stagno, antimonio: le opere di Poussin a Saraceni Authors: Pelosi, Claudia; Santamaria, Ulderico; Morresi, Fabio; Agresti, Giorgia; De Santis, Alberto; Mattei, Elisabetta Abstract: In order to characterize the yellow pigments utilized by Carlo Saraceni in The Martyrdom St Erasmus (1612-14), Cathedral of Gaeta (Lt),and by Nicolas Poussin in The Gedeone’s Victory over Madianiti (1623-26) and The Martyrdom St Erasmus both finding at Vatican’s Museum had been applied: micro-Raman spectroscopy, fluorescence X, SEM with micro-analysis EDS, observations at optic-mineralogical microscope and spectro colorimetric analysis; some of these methods were applied on artworks directly, others by micro-pattern taken over paintings. The same investigations had been applied also over others patterns of yellow pigments having the same typology of materials employed by painters and that had been retrieved by commerce from the firms of Kremer and Zecchi.

2007-08-31T22:00:00Z Pelosi, Claudia Agresti, Giorgia Santamaria, Ulderico Mattei, Elisabetta http://hdl.handle.net/2067/1233 2011-03-01T19:57:44Z 2009-12-31T23:00:00Z

Title: Artificial yellow pigments: production and characterization through spectroscopic methods of analysis Authors: Pelosi, Claudia; Agresti, Giorgia; Santamaria, Ulderico; Mattei, Elisabetta Abstract: Artificial yellow pigments (lead-tin yellow type I and type II, lead antimonate yellow and lead-tin-antimony yellow) have been produced, starting from various recipes and from pure chemicals, in different experimental conditions. The products were analysed using micro-Raman spectroscopy. Differences in stoichiometric ratios, in melting temperatures and in crucible typologies were examined. Other analytical techniques were required to characterize the stoichiometric ratios of the obtained products (X-ray diffraction, scanning electron microscopy with energy dispersive spectroscopy and differential thermal analysis).The results are analysed and discussed in terms of correlations among chemical composition, melting conditions and colour hue.

2009-12-31T23:00:00Z Mattei, Elisabetta De Vivo, Giulia De Santis, Alberto Gaetani, Carolina Pelosi, Claudia Santamaria, Ulderico http://hdl.handle.net/2067/1325 2011-03-18T01:30:44Z 2008-01-31T23:00:00Z

Title: Raman spectroscopic analysis of azurite blackening Authors: Mattei, Elisabetta; De Vivo, Giulia; De Santis, Alberto; Gaetani, Carolina; Pelosi, Claudia; Santamaria, Ulderico Abstract: Azurite is a basic copper carbonate pigment largely employed in painting realization. The areas painted with azurite are easily alterable and are often less resistant than the other parts of artworks. The azurite alteration in a black pigment, the copper oxide (tenorite), has been studied by micro-Raman spectroscopy. The blackening can be due to thermal or chemical alterations: in the second case the alterations being due to the presence of alkaline conditions. Laser-induced degradation of azurite has been studied as a function of the grain size. The results show that the temperature of the grains decreases as the size increases, and azurite degrades into tenorite only below the critical value of 25 μm. To study the chemical alteration of azurite, the pigment has been applied on the plaster of terracotta samples and analyzed at different pH values by micro-Raman spectroscopy. As opposed to most part of the analytical techniques, it can detect the presence of both azurite and tenorite molecules in the same micro areas, and provides a valuable tool to determine azurite degradation.

2008-01-31T23:00:00Z Genco, Giorgia Lo Monaco, Angela Pelosi, Claudia Picchio, Rodolfo Santamaria, Ulderico http://hdl.handle.net/2067/1270 2011-06-03T16:41:17Z 2008-12-31T23:00:00Z

Title: La valutazione sperimentale dei consolidanti per il legno Authors: Genco, Giorgia; Lo Monaco, Angela; Pelosi, Claudia; Picchio, Rodolfo; Santamaria, Ulderico Abstract: The aim of this work has been to test some commercial products as consolidants of the structure of two wooden species: poplar (Populus sp.) and walnut (Juglans regia L.). The chosen products are acrylic, epoxy and aliphatic compounds available in commerce and often employed for other applications. The wooden samples have been prepared according to the UNI ISO instructions. The wood characteristic parameters have been measured: density, basic density, shrinkage, porosity, colour. The wooden samples have been artificial aged by means of frost/thaw cycles. The consolidants have been applied to the wood samples aged and not by means of under vacuum immersion. At the end the wood characteristic parameters and the FTIR spectra have been measured to evaluate the product effectiveness for the wood treatment.

2008-12-31T23:00:00Z Pelosi, Claudia Santamaria, Ulderico Agresti, Giorgia Morresi, Fabio Cibin, Francesca De Filippo, Barbara http://hdl.handle.net/2067/1335 2011-03-18T01:30:24Z 2008-05-31T22:00:00Z

Title: Colore e materia: i gialli di piombo, stagno, antimonio Authors: Pelosi, Claudia; Santamaria, Ulderico; Agresti, Giorgia; Morresi, Fabio; Cibin, Francesca; De Filippo, Barbara Abstract: The aim of this work is to investigate the methods used for producing artificial yellow pigments (‘type I’ and ‘type II’ lead-tin yellow, lead antimonate yellow or Naples yellow, and lead-tin-antimony yellow), starting from various recipes and the more recent literature, and to characterize the materials produced by utilising different analytical techniques. The artificial yellow pigments were obtained from pure chemicals (PbO, Pb3O4, SnO2, Sb3O4). The effects produced were tested by varying the stoichiometric ratios, melting temperatures and times, and crucible typologies. The powders obtained were characterized by means of SEM-EDS, XRD, XRF and DTA analyses. In order to evaluate the colour changes due to different melting temperatures and stoichiometric ratios, the colour measurements were taken using CIExy 1931 and CIE 1976Lab coordinates.

2008-05-31T22:00:00Z Pelosi, Claudia Santamaria, Ulderico Agresti, Giorgia Mattei, Elisabetta De Santis, Alberto http://hdl.handle.net/2067/1329 2011-03-18T01:31:06Z 2007-12-31T23:00:00Z

Title: Production and characterisation of lead, tin and antimony based yellow pigments Authors: Pelosi, Claudia; Santamaria, Ulderico; Agresti, Giorgia; Mattei, Elisabetta; De Santis, Alberto Abstract: This study deals with the preparation of yellow pigments (lead-tin yellow type I and II, lead antimoniate yellow and lead-tin-antimony yellow), which are affected by terminological confusion in the historical references. Through the centuries, yellows of different compositions, based on lead, tin and antimony, have been used either as agents that turn glasses, glazes and majolica opaque or as paint-pigments. Some types of yellow pigments were described in written sources. These sources are very hard to discover because production methods and formulas of artistic compounds were handed down to new generations in oral way. Sometimes, they were collected in secret books of pigments. In addition, artists and writers, during the utilization and production of lead-tin-antimony yellows, introduced some changes both in recipes and terminologies. All this produced great confusion in the nomenclature that changes the country tradition and, sometimes, for the writer’s inaccuracies. By analyzing the various recipes concerning lead-tin-antimony yellows, it was possible to reconstruct the original production methods of these pigments. We produced lead-tin yellow type I (Pb2SnO4) and lead-tin yellow type II (PbSnO3 or PbSn1-x SixO3) following the indication of the recipes 272 and 273 of the fifteenth century Bolognese Manuscript, lead antimonate yellow, called Napoli yellow, according to the treatises written by Piccolpasso, Passeri and Mariano from Pesaro, and lead-tin-antimony yellow from the Darduin, Mariani da Pesaro and other recipes authors. The production of lead-tin-antimony based yellow pigments was obtained by pure chemicals oxides (PbO, Pb3O4, SnO2 and Sb2O3). In synthesizing the yellow pigments, the effects produced by changes in stoichiometric ratios, in melting temperatures and in the crucible typologies were tested. The obtained products were characterized by SEM-EDS, XRD and micro-Raman analyses. To evaluate colour changes due to different melting temperatures and stoichiometric ratios, the colour measurements were taken in CIE 1931 and CIE 1976 coordinates. The results are analysed and discussed in terms of correlations among chemical compositions, melting conditions and colour hue. The study of these pigments, produced in laboratory with the ancient procedure, is also useful for investigations on similar materials used in the works of art. Indeed, it is very probable that the artists chose their painting materials by selecting not only the colour hue of the pigments but also the production method. Therefore, it is important to state a correlation between chemical compositions, ancient production methods, and the final colour hue of the produced yellow pigments.

2007-12-31T23:00:00Z Pelosi, Claudia Roserba, Federica Santamaria, Ulderico http://hdl.handle.net/2067/1697 2011-03-25T12:17:20Z 2008-12-31T23:00:00Z

Title: Cleaning of paper works with selective solvent methods Authors: Pelosi, Claudia; Roserba, Federica; Santamaria, Ulderico Abstract: This work deals with the study of the weathering processes due to the use of adhesive tape for the restoration of paper and for temporary exhibitions. Oxidation and depolymerization effects of industrial and handmade paper and parchment were investigated on samples in relation to the temperature, the relative humidity and the radiation exposure conditions. The experimental tests were tried out with 4x14,5 cm industrial and handmade paper and parchment samples. The following adhesive tapes were analyzed: Tesa Adhesive and Biadhesive, Eurocel Ecophan and Eurocel Biadhesive, 3M Magic 810 and 3M Biadhesive. The samples were examined by DRIFT FTIR and µ-FTIR analyses. The effects of chemical and chemical-physical processes of the adhesive-paper system were evaluated. In particular, the colour changes were evaluated by means of ΔE and ΔL values calculated according to UNI-NORMAL 43/93. The aged adhesive-paper samples had undergone some cleaning tests using different solvent mixtures with and without thickening agents. The preliminary results of the cleaning tests were compared ad discussed in order to evaluate the choice of the better methods.

2008-12-31T23:00:00Z Pelosi, Claudia Santamaria, Ulderico Scotton, Roberta http://hdl.handle.net/2067/1755 2011-03-29T00:31:12Z 2009-12-31T23:00:00Z

Title: The tomb nr.57 from Servici Cemetery in Novilara (Italy): diagnostic analysis and state of preservation Authors: Pelosi, Claudia; Santamaria, Ulderico; Scotton, Roberta Abstract: The 7th century BC Servici tomb nr. 57 was discovered and removed in 1892-1893 by archaeologist Edoardo Brizio in Novilara (Marche region in central Italy) and in the early 1900’s the tomb was transported to the Archaeological Museum of Florence. The tomb contains two skeletons, one male and one female, and their respective funerary belongings. In spring 2005 SACI (Studio Art Centers International) in collaboration with the Archaeological Superintendence of Tuscany and Tuscia University of Viterbo undertook the conservation of the tomb. After an accurate documentation the tomb underwent a micro excavation to bring to light and to restore the skeletons and the objects. On this occasion some diagnostic analysis was performed in order to support the restores work and to better know the materials used in past restoration and interventions on the tomb. Moreover some materials of the original burial have been analysed. The samples taken during the restoration intervention were analyzed by means of FTIR and micro-FTIR spectrometry, micro Raman spectroscopy, polarizing microscope observation under visible light and UV fluorescence, SEM observation. The analysis confirmed the hypothesis that sodium silicate have been used as consolidant before the tomb pulling out. Gypsum has also been found probably employed to paint the tomb walls. Some little textile fragments have been analysed revealing the presence of flax.

2009-12-31T23:00:00Z Pelosi, Claudia Santamaria, Ulderico Agresti, Giorgia Castro, Fabio Lotti, Davide Pogliani, Paola http://hdl.handle.net/2067/1752 2011-03-29T00:31:12Z 2009-12-31T23:00:00Z

Title: Project on the rock paintings in Cappadocia. Analytical investigation of the church of Forty Martyrs in Şahinefendi and other sites (Report 2008) Authors: Pelosi, Claudia; Santamaria, Ulderico; Agresti, Giorgia; Castro, Fabio; Lotti, Davide; Pogliani, Paola Abstract: This report will relate about the main results of the analyses carried out on the rock paintings of several Cappadocia churches. The analyses have been carried out within the survey “Rock paintings in Cappadocia. For a project of knowledge, conservation and valorization of the church of the Forty Martyrs at Şahinefendi and its territory” directed by Prof. Maria Andaloro of Tuscia University (Italy) . Such analyses have been carried out according to a methodological path tested during the several years of surveys in Turkey, particularly on the island of Küçük Tavşan and on many other sites in the territory of Mandalya Gulf and also on the occasion of other research projects . This research mission is part of a bigger project called “For a data bank of wall paintings and mosaics of Asia Minor (4th-15th centuries: images, materials, techniques of execution (1996-2010)” directed by Prof. Maria Andaloro. The aim of this work concerns the understanding of the constitutive materials, the execution techniques and the conservation conditions of the rock paintings. For this reason several in situ and laboratory analyses have been undertaken. In the first part of this report the main results of the analyses carried out during the 2008 campaign on the Forty Martyrs Church at Şahinefendi and of a group of churches in the region of Nevşheir will be described. In the second one an overall view on the three years analyses of the materials collected during the surveys will be shortly presented. The attention will be focused on the pigments of the rock paintings with some reference to the stratigraphic analyses and to the binders of the pigments.

2009-12-31T23:00:00Z Pelosi, Claudia Santamaria, Ulderico http://hdl.handle.net/2067/2235 2012-01-16T10:54:14Z 2010-12-31T23:00:00Z

Title: In margine all’intervento di Laura Palmieri. Problematiche conservative nell’arte contemporanea: tecniche “non tradizionali” e test di laboratorio Authors: Pelosi, Claudia; Santamaria, Ulderico Abstract: In questa breve relazione vengono evidenziati alcuni concetti importanti legati alla conservazione dei materiali dell’arte contemporanea e viene presentata una piccola, ma significativa, sperimentazione che ha fornito all’artista un supporto al suo lavoro. In primo luogo si è voluto sottolineare che lo studio del comportamento nel tempo dei prodotti commerciali impiegati nelle tecniche artistiche e nella conservazione è molto importante e dovrebbe costituire una prassi che però a tutt’oggi non è certamente consolidata. Inoltre, accanto al controllo della stabilità dei materiali sia pittorici che per la conservazione, dovrebbe porsi l’operazione di monitoraggio nel tempo degli stessi una volta applicati, soprattutto se si tratta di tecniche e modalità sperimentali; ma anche questa operazione, sicuramente non semplice, è tutt’altro che una prassi consolidata. Pertanto ci si augura che l’esperienza condotta possa essere servita sia ai tirocinanti come esempio di metodologia di lavoro ma anche al lavoro di Laura Palmieri e alla conservazione della sua opera.

2010-12-31T23:00:00Z