On oxidative degradation of parchment and its non-destructive characterisation and dating

Možir, Alenka; Strlič, Matija; Trafela, Tanja; Cigić, Irena Kralj; Kolar, Jana; Deselnicu, Viorica; Bruin, Gerrit de

doi:10.1007/s00339-010-6108-z

Cited by 23 publications

(23 citation statements)

References 18 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: 71%

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: 71%

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

et al. 2011

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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

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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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“…Near Infrared spectroscopy has developed as a powerful tool for the analysis of historical material in recent years, including studies on parchment [16]. Given a uniform material and large enough library of samples, statistical methods such as partial least squares (PLS) can be used to develop predictive models based on NIR spectra.…”

Section: Near-infrared Analysis (Nir)mentioning

confidence: 99%

Is there evidence for change to collagen within parchment samples after exposure to an X-ray dose during high contrast X-ray microtomography? a multi technique investigation

et al. 2013

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Abstract:The potential use of high contrast X-ray microtomography (XMT) for the reading of fragile historic documents without the need to physically unravel them is a new analytical imaging development in the field of conservation however, it is important to first assess if there is any evidence of change in the parchment structure during scanning by XMT. Modern and historic parchment samples were exposed to X-rays using the high contrast XMT equipment. Attenuated Total Reflection Fourier Transform Infra-red Spectroscopy (ATR-FTIR), SDS-polyacrylamide gel electrophoresis (SDS-PAGE), Near-infrared Spectroscopy (NIR) and X-ray diffraction (XRD) were utilised to investigate whether there is any evidence for change to collagen within parchment samples after exposure to XMT. Results show that the inherent differences in the parchment structure due to the material source, production and storage appear to produce larger differences than that due to the exposure to XMT. This indicates that XMT may be a suitable technique for data recovery from parchment samples that cannot be unrolled.

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On oxidative degradation of parchment and its non-destructive characterisation and dating

Cited by 23 publications

References 18 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

Characterisation of 19th and 20th century Chinese paper

Is there evidence for change to collagen within parchment samples after exposure to an X-ray dose during high contrast X-ray microtomography? a multi technique investigation

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