Laser cleaning of parchment: Structural, thermal and biochemical studies into the effect of wavelength and fluence

Craig J Kennedy; Marie Vest; Martin Cooper; Tim J Wess

doi:10.1016/j.apsusc.2003.11.057

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Laser cleaning of parchment: Structural, thermal and biochemical studies into the effect of wavelength and fluence

Journal article

Peer reviewed

Laser cleaning of parchment: Structural, thermal and biochemical studies into the effect of wavelength and fluence

Craig J Kennedy, Marie Vest, Martin Cooper and Tim J Wess

Applied Surface Science, Vol.227(1-4), pp.151-163

2004

DOI: https://doi.org/10.1016/j.apsusc.2003.11.057

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Abstract

parchment

collagen

laser cleaning

X-ray diffraction

SDS-PAGE

shrinkage temperature

Laser cleaning of parchment is a novel technique that has the potential to provide contactless, chemical-free cleaning of historically important documents. However, the effect of laser cleaning on the collagenous structure of parchment is still poorly understood, as is the effect of the wavelength or the energy density (fluence level) used to clean parchment. In this study, small angle X-ray scattering (SAXS), shrinkage temperature (Ts) measurements by the micro hot table technique and SDS-polyacrylamide gel electrophoresis (SDS-PAGE) of parchment samples after laser cleaning reveal the effect of cleaning to the structural, thermal and molecular characteristics of parchment, respectively. The effect of cleaning at infrared (1064nm), green (532nm) and ultraviolet (266nm) wavelengths at a range of fluence levels is investigated. SAXS is used to investigate the removal of dirt from parchment. Laser cleaning at IR or green wavelengths appears not to alter the collagen diffraction pattern from SAXS, the shrinkage activity or shrinkage temperature from Ts measurements or the molecular integrity of parchment as shown by SDS-PAGE. However, parchments cleaned at the ultraviolet wavelength display structural damage and a reduction in hydrothermal stability and molecular integrity. © 2003 Elsevier B.V. All rights reserved.

Details

Title: Laser cleaning of parchment: Structural, thermal and biochemical studies into the effect of wavelength and fluence
Authors: Craig J Kennedy (Author) - University of Cardiff, United Kingdom
Marie Vest (Author) - Esplanaden, United Kingdom
Martin Cooper (Author) - Laser Technology, United Kingdom
Tim J Wess (Author) - University of Cardiff, United Kingdom
Publication details: Applied Surface Science, Vol.227(1-4), pp.151-163
Publisher: Elsevier BV
Date published: 2004
DOI: 10.1016/j.apsusc.2003.11.057
ISSN: 0169-4332
Organisation Unit: Office of the Deputy Vice-Chancellor (Academic); University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451248402621
Output Type: Journal article

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Collaboration types: International collaboration
Web Of Science research areas: Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter