The past and the future of chromogenic colour photographs: lifetime modelling using near-infrared spectroscopy &amp; enhancement using hypoxia

Fenech, Ann; Strlič, Matija; Cassar, May

doi:10.1007/s00339-011-6688-2

Cited by 10 publications

(7 citation statements)

References 10 publications

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“…The loss of accuracy is most probably related to the sampling variance. The quality of the model is similar to the quality of other dating models for chromogenic color prints (RMSECV = 5.4 years / 1942-2008 period) [32], and paper produced post-1850 (RMSEP = 9 years / 1850-1990 period) [31], and better than obtained for parchment (RMSECV = 72 years / 1200-1800 period) [35]. While the error of prediction (RMSEP) is acceptable, it is worth examining the uncertainty in the reference dates for the film stills.…”

Section: Development Of the Calibration Methodssupporting

confidence: 64%

Non-destructive dating of fiber-based gelatin silver prints using near-infrared spectroscopy and multivariate analysis

et al. 2011

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An innovative approach to date fiber based gelatin silver prints using Near Infrared Spectroscopy and Multivariate Analysis (NIR/MVA) is presented. NIR spectra were acquired for 152 film stills printed in the US between 1914 and 1986 and Partial Least Square (PLS) analysis was used to correlate the spectra with the year the photographs were printed. Principal Component Analysis (PCA) and spectral interpretation helped clarify the underlying correlation between the print date and the composition and ageing of the photographic papers. The method was successfully validated with an independent set of 66 film stills printed in the US and a prediction error (RMSEP) of 6 years was achieved. The method was also tested on films stills printed in Germany and Russia, as well as amateur prints and photographs in the collection of the Museum of Modern Art (MoMA). The prediction error was significantly larger, with the exception of the amateur prints, due to differences in the composition and/or properties of the papers depending on their geographical origin and purpose as confirmed by Discriminant Analysis (PLS-DA) Published

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Section: Development Of the Calibration Methodssupporting

confidence: 64%

Non-destructive dating of fiber-based gelatin silver prints using near-infrared spectroscopy and multivariate analysis

et al. 2011

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“…The differentiation of the starting points can be assigned to geographical origin and manufacturing process. Comparable results were found for chromogenic color photographs 61 …”

Section: Datingsupporting

confidence: 53%

Recent developments in using the molecular decay dating method: a review

Tintner

2021

Annals of the New York Academy of Sciences

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The dating of organic findings is a fundamental task for many scientific fields. Radiocarbon dating is currently the most commonly used method. For wood, dendrochronology is another state-of-the-art method. Both methods suffer from systematic restrictions, leading to samples that have not yet been able to be dated. Molecular changes over time are reported for many materials under different preservation conditions. Many of them are intrinsically monotonous. These monotonous molecular decay (MD) patterns can be understood as clocks that start at the time when a given molecule was formed. Factors that influence these clocks include input material composition and preservation conditions. Different wood species, degrees of pyrolysis, and pretreatments lead to different prediction models. Preservation conditions might change the speed of a given clock and lead to different prediction models. Currently published models for predicting the age of wood, paper, and parchment depend on infrared spectroscopy. In contrast to radiocarbon dating, dating via MD does not comprise a single methodology. Some clocks may deliver less precise results than the others. Ultimately, developing a completely different, new dating strategy-such as MD dating-will help to bring to light a treasure trove of information hidden in the darkness of organic findings.

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“…It is possible to hypothesise that dating of paper using NIR is enabled due to the accumulation of degradation products during ageing, as well as due to the frequent changes in the manufacturing processes of historic materials. Both are reflected in the NIR spectra and these in turn enable dating, as has been shown previously for paper as well as for photographs and parchment [47][48][49]. It is not possible, due to the highly overlapped NIR absorption peaks, to examine which compounds or bond types specifically contribute to the success of PLS regressions for dating.…”

Section: Near Infrared Spectroscopymentioning

confidence: 96%

Characterisation of 19th and 20th century Chinese paper

Brown

Lichtblau²,

Fearn

et al. 2017

Herit Sci

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The chemical and physical properties of 19th and 20th century Chinese papers were investigated using a variety of material characterisation methods. A reference collection of 178 Chinese papers, dating from 1799 to 1990 was used, and properties such as pH, degree of polymerisation (DP), lignin content, and tensile strength (zero-span) were determined. Most of the papers were of approximately neutral pH, had a low lignin content and DP similar to pre-19th century European rag paper. It was found that the high inhomogeneity and the typical paper thinness affected tensile testing and as a result, a modified method for zero-span tensile strength test was developed. Using near infrared spectroscopy (NIR), proof-of-concept partial least squares (PLS) applications were developed for determination of tensile strength, pH, DP and for dating of the samples. For the latter, using post-1900 papers, the error of cross validation was 13 years. The presence of lignin was modelled using linear discriminant analysis (LDA), where the model could distinguish between high and low lignin content with 88% accuracy. Using one or multiple sheets for transmission NIR spectroscopy led to PLS results of similar quality, which was attributed to material inhomogeneity.

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The past and the future of chromogenic colour photographs: lifetime modelling using near-infrared spectroscopy & enhancement using hypoxia

Cited by 10 publications

References 10 publications

Non-destructive dating of fiber-based gelatin silver prints using near-infrared spectroscopy and multivariate analysis

Non-destructive dating of fiber-based gelatin silver prints using near-infrared spectroscopy and multivariate analysis

Recent developments in using the molecular decay dating method: a review

Characterisation of 19th and 20th century Chinese paper

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