Estudo de métodos de consolidação de documentos com tinta ferrogálica

  • Joana Filipa Costa Carvalho (Student)

Student thesis: Master's Thesis


The main goals of this study were to understand the main factors contributing to the degradation of ferrogalic ink, which damages caused to the documents and to help identify the most appropriate method for its consolidation. This internship was performed as part of the master's degree programme at the School of Arts of the Portuguese Catholic University, being part of the Scanning Project of Archive Funds at the Porto District Archive, developed under the Ministry of Culture's PRR - Recovery and Resilience Plan. Therefore, in this internship there was a focus on assessing and preparing documentation with ferrogalic ink for the scanning process, in order to understand the scale of the conservation problem that precedes the duplication of older documentation and providing practical experience in solving this problematic. The aim was to find innovative solutions to this conservation problem by comparing different intervention methods and materials, always considering minimal intervention strate gies and long-term preservation. In the context of the internship, the main problems found in historical documents with this type of ink were identified. Based on this reality, we tried to understand how this degrada tion can be slowed down and what the most efficient consolidation method is. According to this, a ferrogalic ink was produced from a medieval recipe, which was applied simultaneously to historical paper and neutral paper (filter paper regularly used in the laboratory, without additives), as a mean of comparison. Three different consolidation methods were applied to these papers and inks: Tylose®, Klucel® and Crompton Tissue®. The samples were artificially ageing, following the ISO 5630:3 of 1986, duly analysed and the results interpreted. The aim was to clarify which method or methods were the most effective, namely those that, over time, demonstrate greater physical and chemical stability, had good operational performance and, consequently, can be considered the most suitable for this type of work.
Date of Award25 Jan 2024
Original languagePortuguese
Awarding Institution
  • Universidade Católica Portuguesa
SupervisorNuno Camarneiro (Supervisor) & Maria Conceição Casanova (Co-Supervisor)


  • Porto District Archive
  • Graphic documents
  • Ferrogalic ink
  • Consolidation


  • Mestrado em Conservação e Restauro de Bens Culturais

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