Characterization of Historic Silk by Polarized Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy for Informed Conservation

Garside, Paul; Lahlil, Sophia; Wyeth, Paul

doi:10.1366/000370205774430855

Cited by 49 publications

(37 citation statements)

References 3 publications

(1 reference statement)

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“…Richardson et al 12 reviewed a number of further analytical techniques for non-destructive canvas and textile analysis, including polarised ATR FTIR, spectra of which have been shown to reect mechanical strength of silk bres. 13 However, many of these techniques require sampling and/or laboratory-based analytical techniques.…”

Section: Introductionmentioning

confidence: 99%

Looking beneath Dalí's paint: non-destructive canvas analysis

et al. 2014

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A new analytical method was developed to non-destructively determine pH and degree of polymerisation (DP) of cellulose in fibres in 19 th -20 th century painting canvases, and to identify the fibre type: cotton, linen, hemp, ramie or jute. The method is based on NIR spectroscopy and multivariate data analysis, while for calibration and validation a reference collection of 199 historical canvas samples was used. The reference collection was analysed destructively using microscopy and chemical analytical methods.Partial least squares regression was used to build quantitative methods to determine pH and DP, and linear discriminant analysis was used to determine the fibre type. To interpret the obtained chemical information, an expert assessment panel developed a categorisation system to discriminate between canvases that may not be fit to withstand excessive mechanical stress, e.g. transportation. The limiting DP for this category was found to be 600. With the new method and categorisation system, canvases of 12 Dalí paintings from the Fundació Gala-Salvador Dalí (Figueres, Spain) were non-destructively analysed for pH, DP and fibre type, and their fitness determined, which informs conservation recommendations. The study demonstrates that collection-wide canvas condition surveys can be performed efficiently and non-destructively, which could significantly improve collection management.

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Section: Introductionmentioning

confidence: 99%

Looking beneath Dalí's paint: non-destructive canvas analysis

et al. 2014

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“…According to the work of Paul Garside et al [10], the most reliable and satisfactory proved to be the direct measurement of intensities within the amide I band, at points corresponding to the theoretical maxima for the -sheet (1615 cm 1 ) and -helix/random coil (1655 cm 1 ) motifs, above a baseline drawn from 1730 to 865 cm 1 , giving the intensities I  and I  respectively. Spectral deconvolution showed an intensity measured at 1615 cm 1 (I  ) to be composed largely (50%-70%) of the -sheet contribution, and similarly the intensity at 1655 cm 1 (I  ) to arise predominantly (50%-60%) from the -helix component.…”

Section: Atrmentioning

confidence: 99%

Performance measurement of sericin-coated silks during aging

Zhang

Wyeth

2011

Sci. China Chem.

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Silks are among the most precious ancient and historic artefacts worldwide. While washing removes the natural gum from the fibres during the fabrication of most silk textiles, for a small proportion of historic silks some or perhaps all of the sericin still remains. This paper investigated the effect of sericin coating on the aging of silk fibroin by means of ATR and tensile testing. The results show that sericin can provide some extent of protection from light and heat aging. However, in high humidity environments degummed and ungummed silk aged at the same rate because of leaching of sericin. Silk degraded at faster rate and more extensively in a moist environment. ATR could give very useful information about the aging of silk. The ATR-derived crystallinity index is good at tracing the aging factor and extent of silk deterioration. Alanine and tyrosine within fibroin, as estimated by ATR spectroscopy, are very sensitive to light, but not to heat and water. The ATR absorbance intensity ratio I amide III / I amide I is very useful for deterioration evaluation of archaeological silk objects. As a high humidity resulted in the leaching of silk, it is suggested for sericin-coated silk in collections, that not only wet cleaning is harmful, but also that storage or display in a high RH environment would be detrimental. attenuated total reflectance infrared spectroscopy, archaeological silk, sericin

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“…Such changes are readily identified using polarised infrared spectroscopy [Cardamone, 1989;Chen and Jakes, 2001;Garside et al, 2005;Garside and Wyeth, 2002]. Such changes are readily identified using polarised infrared spectroscopy [Cardamone, 1989;Chen and Jakes, 2001;Garside et al, 2005;Garside and Wyeth, 2002].…”

Section: Textilesmentioning

confidence: 99%

Molecular Spectroscopy

2007

Analytical Techniques in Materials Conservation

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Characterization of Historic Silk by Polarized Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy for Informed Conservation

Cited by 49 publications

References 3 publications

Looking beneath Dalí's paint: non-destructive canvas analysis

Looking beneath Dalí's paint: non-destructive canvas analysis

Performance measurement of sericin-coated silks during aging

Molecular Spectroscopy

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