Does the Artemidorus papyrus have multiple lives? Seeking for the answer in the inks through a Raman and PCA analysis

Capone, Barbara; Biocca, P; Corsi, Pietro; Meneghini, Carlo; Bicchieri, Marina

doi:10.1016/j.culher.2021.02.003

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…A combination of Raman and PCA has also been applied in the authenticity quest of the Artemidoros papyrus. 20 As carbon blacks were often used as writing materials, and their Raman spectra are fairly similar, PCA has been used for a two-step comparison with a spectral library assembled for the scope of the paper, which included both natural and synthetic modern pigments; 170 micro-Raman spectra (785-nm laser, spectral resolution of 3 cm À1 ) were acquired on all three sections of the papyrus, on both sides, and considering text, geometric and figurative elements. Spectral decomposition was also performed, to estimate each carbon configuration's contribution to the spectrum.…”

Section: Pca On Raman Spectramentioning

confidence: 99%

An overview of Principal Components Analysis approaches in Raman studies of cultural heritage materials

Coccato,

Caggiani

2023

J Raman Spectroscopy

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The present overview answers the need of assessing the current state of the art concerning the application of principal components analysis (PCA) to Raman spectroscopy investigations of cultural heritage and related materials. An increment of the employment of this multivariate statistic technique to Raman results in the mentioned field began between 15 and 10 years ago, after a very slow start at the turn of the millennium. A delay of about a decade was observed with respect to PCA applied to elemental quantitative data of archaeometric analyses, likely a consequence of the required spectral pre‐treatment and to results of complex interpretation. Therefore, it is by now the time to summarize this evolution in a comprehensive, yet very specific way. In this overview, painting constituents were considered, both colouring materials and binders, in addition to natural and synthetic glasses, and biogenic and mineral gemmological materials. A marked unbalance between the studies pertaining to the different sections has been noticed, revealing a concentration of the work mainly on painting materials, including the study of ageing and alteration. The different aims of PCA application to Raman spectra, the various approaches and the achievable results, with the possible arising problems, were underlined, too. Special attention was given to the pre‐treatment of the spectra, which was observed to be essential to overcome the influence of several issues concerning bands intensity, spectral noise, background, fluorescence and so on.

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Section: Pca On Raman Spectramentioning

confidence: 99%

An overview of Principal Components Analysis approaches in Raman studies of cultural heritage materials

Coccato,

Caggiani

2023

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…Capone et al used Raman and Principal Component Analysis (PCA) to determine if the Artemidorus papyrus was written over three different eras, based on the inks used on this document [ 416 ].…”

Section: Forensic Document Examinationmentioning

confidence: 99%