Navegando por Assunto "Conservation and restoration"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Lime-based restoration paints: characterization and evaluation of formulations using a native species from the Amazon flora and PVA-based glue as additives
(Universidade Federal do Pará, 2017-09) SILVA, Mayra Martins; SANJAD, Thais Alessandra Bastos Caminha; COSTA, Marcondes Lima da; COSTA, Solange do Perpétuo Socorro Evangelista
Based on historic documents, two lime-based paint formulations were produced in laboratory in order to evaluate their basic characteristics as restoration materials for historic buildings with lime-based components. The paints were made basically with hydrated lime, clay, water and linseed (Linum usitatissimum L.) oil, and one formulation had PVA (polyvinyl acetate)-based glue as fixative, and the other one, Couma guianensis' latex. Each paint component was characterized by XRD and FTIR, and color and specular gloss measurements were performed on both paints. A preliminary assessment of the paints was conducted using the Pipe Method, the salt crystallization test, visual analysis for dustiness, and analysis of microbiological growth. The results showed that the laboratory-produced paints are theoretically and technologically compatible with lime-based coatings, however, their superficial performance can be improved to achieve greater durability. This study also brings to light local materials from the Amazon region that have great potential to be used and recognized as raw materials for paints and which could also be investigated for other uses.
Acesso aberto (Open Access)
Mosaicos de Belém: história e conservação
(Universidade Federal do Pará, 2013-08-30) TOSCANO, Thais Zumero; SANJAD, Thais Alessandra Bastos Caminha; http://lattes.cnpq.br/8950586647715771
The mosaic is an ancient art which impacts the history of civilizations. The city of Belém po-sesses a beautiful, peculiar and rare acquis. For being so uncommon, it is not regarded as an autonomous or as well integrated art. This fact becomes visible due to the lack of biblio-graphical data and registries on the theme. This research aims to demonstrate such facts by means of a historical contextualization and a literature review that covers techniques, con-servation, common damages and frequent pathological conditions. The main focus of this study is the mosaic collection of the city of Belém /Pará. It identifies techniques, typologies, datings, physical constitutive characteristics of the employed materials. Materials and me-thods are presented starting from the samples selected. After the analysis of these samples with their features and physical chracateristics by optic microscopy the study comes to its final part, the conclusions based on the necessary preservation of this cultural asset which integrates the memory of the city.