Towards a methodological approach to identify the main components used in historic photographs

In this work, a methodology is proposed to identify the components used in historic photographs using non-invasive and non-destructive characterisation techniques. The methodology provides an approach for analysing photographs by following three steps represented in a flowchart: firstly, the type of...

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Bibliographic Details
Published inJournal of the Institute of Conservation Vol. 46; no. 1; pp. 23 - 36
Main Authors Nieto Villena, Alejandra, Martínez, José Refugio, Guerrero, Azdrubal Lobo, Arauz Lara, José Luis, Flores-Camacho, José Manuel, Lastras-Martínez, Alfonso, de la Cruz Mendoza, José Ángel, Ortega Zarzosa, Gerardo, García, Álvaro Solbes
Format Journal Article
LanguageEnglish
Published Abingdon Routledge 02.01.2023
Taylor & Francis Ltd
Subjects
Atomic force microscopy
Barite
Barium hydroxide
Classification
Confocal microscopy
Conservation
conservation proposal
experimental techniques
Flow charts
flowchart
Infrared photography
Infrared spectroscopy
Methodology
Microscopy
non-destructive analysis
Nondestructive testing
photographic binders
Photography
photography conservation
Physical characteristics
Qualitative analysis
Raman spectroscopy
Spectroellipsometry
Spectrum analysis
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Summary:In this work, a methodology is proposed to identify the components used in historic photographs using non-invasive and non-destructive characterisation techniques. The methodology provides an approach for analysing photographs by following three steps represented in a flowchart: firstly, the type of binder is determined by identifying morphological and structural characteristics; secondly, the presence or absence of a baryta layer is established; and finally, the presence of organic components used as part of a protective layer is determined. The characteristics and properties revealed using this methodology identify the type of historic photograph through different analytical techniques that provide science-based evidence for any qualitative observations first made. These techniques are interchangeable as they identify specific characteristics in the photographs by using infrared spectroscopy, Raman spectroscopy, infrared spectroscopic ellipsometry, confocal microscopy and atomic force microscopy, among others. As such, the methodology proposed facilitates a secure evidence-based classification of photographs and provides valuable information for their conservation.
ISSN:1945-5224
1945-5232
DOI:10.1080/19455224.2022.2157459