RCAAP Repository

No summary/description provided

No summary/description provided

No summary/description provided

No summary/description provided

No summary/description provided

Green approach to conservation is becoming increasingly popular in the recent years, focusing on finding products that could provide a guarantee of stability over time, with a view to perform reversible, compatible and less invasive interventions on the object. The natural adhesive and consolidant algae extract, commonly known as Funori, were introduced and tested for the resizing of paper materials. In this paper are discussed the results of several tests performed to analyse Funori seaweed extracts within restoration of paper as a green solution.

Tarnished silver objects contain a black layer of silver sulfide. Current cleaning methods are not suitable for fragile objects, therefore, this exploratory study set out to develop a new biology-based method to clean silver. The extremophile bacterium Acidithiobacillus ferrooxidans was considered the most promising candidate, because of its ability to oxidize metal sulfides. The bacterium indirectly removed silver sulfide from tarnished silver coupons, through the generation of ferric iron. However, this procedure etched the silver. It was investigated whether A. ferrooxidans was able to directly oxidize silver sulfide in the absence of iron. However, no removal of silver sulfide was observed.

No summary/description provided

This works aims to present a preliminary study about the application on painting of TiO2 nanoparticles for self-cleaning and protective purposes. We firstly assessed the photocatalytic activity of the TiO2 nanoparticles, obtained by Pulsed Laser Ablation, by the discoloration of dye. After, the colloidal dispersion is applied to painting samples prepared in laboratory, according to old recipes and using the most-used historical binders and pigments, in order to verify the cleaning efficiency by discoloration of the chromatic markers. The spectrophotometric analysis is performed studying the Spectral Reflectance Factor trend and the color coordinates.

A Doença de Parkinson atinge hoje aproximadamente 1% da população mundial com mais de 65 anos. São cada vez mais bem conhecidas as manifestações neuropsiquiátricas que se associam à doença e/ou ao tratamento. Pretendemos nesta revisão abordar sumariamente a epidemiologia, fisiopatologia e diagnóstico da Doença de Parkinson, destacando as alterações neuropsiquiátricas: depressão, ansiedade, psicose, demência, perturbações do sono, síndroma de desregulação da dopamina.

The sepulchre of the Blessed Ramon Llull is a XV century monument located in Palma (Mallorca, Spain). During the studies developed for the restoration project, remains of the original polychrome were discovered. Prolonged exposure to high levels of humidity and leaks were the main causes of the deterioration of the monument’s polychromies. The plaster layers lost cohesion and adhesion from the support, so they had to be treated. For the selection of the adhesive, the results obtained in the researches through the current scientific bibliography were analyzed. As a result of the comparative process, ammonium caseinate, Klucel H® and funori were selected, to be tested on the monument for their compatibility, stability, adhesive properties, low optical effects, re-treatability and low concentration. Finally, funori was the definitive product used, with which the desired results were obtained.

This is the report of a practical case regarding the removal of Paraloid® B72 coatings from Roman frescoes. During the archaeological excavation, the paintings had been consolidated with the application of cotton gauze with an acrylic resin. The article presents the results regarding the effectiveness of the removal of the acrylic resin and the analytical assessment of the possible presence of residues on the work of art. The removal of the acrylic resin was carried out with an aqueous gelled system emulsified with only 10% solvent. The selection of the solvent phase presents fewer toxic alternatives to traditional solvents.

Modulo bianco a tripla struttura was made in 1970 by Vanna Nicolotti. The artist, close to the milanese Spatialism of Lucio Fontana, used the technique of cutting canvas in constant search for tridimensionality and geometric perfection through overlapping cut canvases. This technique caused conservation issues and the work wasn’t exposable anymore due its fragility and deterioration. Vanna Nicolotti therefore recommended the substitution of the front canvas or alternatively, as recommended by the conservator-restorer, it was decided to recompose the structural unit taking account of the artist’s poetics. The lacerated parts were reconnected after Agar-Agar gel moistening and by trecker method.

Ethnographic artifacts are intrinsically fragile, due to the natural constituent materials degradation. A polychrome and polymateric ethnographic shield from Borneo, owned by the National Prehistoric Ethnographic Museum “Luigi Pigorini” in Rome, has been carried out to restoration regarded mainly the painted surface cleaning and the feathers recovery, following criteria such as adopting not invasive methods to preserve the original materials and using eco-sustainable products.

Os autores desenvolvem neste trabalho um modelo de intervenção em saúde escolar, reforçando a vantagem da realização dum exame global de saúde no final da idade pré- escolar. Foi feito um levantamento dos objectivos gerais pedagógicos definidos para a educação pré-escolar, dos objectivos da Educação para a Saúde Pré-Escolar e reflectiram sobre a intervenção adequada e articulada em crianças com necessidades educativas especiais, não só no que concerne a necessidades específicas resultantes do tipo e grau de deficiência, mas também na prevenção de outra pro- blemática emergente. Um desenvolvimento harmonioso apela à precocidade da intervenção educativa e à necessidade de se realizar acções de educação para a saúde no jardim de infância.

The Oswaldo Cruz Foundation (Fiocruz) is a Brazilian public institution that holds a diverse range of collections and historical buildings. A medium-term program was established to implement risk management plans for the Foundation’s cultural property. This paper presents the research outcomes and strategies adopted to mitigate the identified risks. The work’s results have been fundamental for the definition of actions that aim to minimize the need for large-scale interventions in cultural assets, reducing the amount of material and financial resources used and avoiding the removal and replacement of large volumes of preexisting materials, minimizing energy consumption and waste generation.

The preservation of artefacts in museum collections is profoundly affected by fluctuations in temperature and relative humidity. This work presents the results of an experimental laboratorial study, conducted in a flow chamber to demonstrate the enormous potential of hygroscopic materials in stabilizing interior relative humidity. In order to assess the risk of mass tourism and hygroscopic inertia of finishing materials, associated with the hygrothermal behavior of museums, an analysis of several numerical scenarios, with a different number of visitors per hour, and finishing materials, in order to quantify the risks associated with the fluctuations of relative humidity. The results of sensitivity studies performed are presented for the case of a museum in Porto.

This paper aims to present the complexity of the preventive conservation and sustainability of the collections that are included in the temporary exhibition ‘Auschwitz. Not Long Ago. Not Far Away’, opened in Madrid in December 2017 and scheduled to travel to new destinations over the next 7 years. It was produced in co-operation with the State Museum of Auschwitz-Birkenau, Poland. The exhibit objects belong to more than twenty international collections concerned with the Heritage of the Holocaust. The methodology to analyze the sustainability of a traveling exhibition has been introduced, in the stage of the preparation, production, assembly, operation, disassembly, and transportation to the next venue, in order to take into consideration the whole Life Cycle of the exhibition. The indicators to consider its impact in the three dimensions of sustainability: environmental, economic and social has been proposed.

This paper discusses application of sustainability principles in the care of museum’s collections and more specifically, in the case of cuneiform tablet collection. The principles of sustainability are inherently present in the idea of memory institutions and their rules of collection preservation. This paper shows how digitalization of collections and the new ways of data storage are well suited for reaching goals of preservation of the collection for future and simultaneously widening access to the collection for those interested. Various methods and approaches employed to achieve protection and opening the collection are presented.

This research aims to explore the possibilities of using plant-based biopolymers as sustainable adhesives for both natural and artificial stone, in such a way that the product would be compatible with the substrate from both a chemical and a mechanical point of view, and would fulfill the criteria of sustainability and reversibility. Mixtures based on soy-protein and lime were tested by comparing their mechanical performance and properties to that of commonly used synthetic adhesives. The preliminary results show that they are potentially effective. Further research should be developed, so as to improve their properties and better understand their long-term behavior