Evaluation of femtosecond laser pulse irradiation of ancient parchment

Walczak, Malgorzata; Oujja, M.; Crespo-Arcá, Luis; García, Ana Victoria Torres; Méndez, C.; Moreno, Pablo; Domingo, Concepción; Castillejo, Marta

doi:10.1016/j.apsusc.2008.09.011

Cited by 20 publications

(13 citation statements)

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“…2,14 Spectroanalytical techniques have proven to be useful to assess the modifications induced by laser irradiation on different materials of interest in Cultural Heritage. 3,7,[15][16][17][18] In this study, the laser-induced physical and chemical modifications of pigments are reassessed on the basis of new advances in laser technology by monitoring these modifications using spectroscopic techniques. Ultra-short pulses and a wider range of wavelengths, greater than the ones previously investigated, are considered here with the aim to understand the phenomena.…”

Section: Introductionmentioning

confidence: 99%

Analytical Spectroscopic Investigation of Wavelength and Pulse Duration Effects on Laser-Induced Changes of Egg-Yolk-Based Tempera Paints

et al. 2010

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The application of laser cleaning methodologies to light-sensitive substrates such as those encountered in artistic paintings is an extremely delicate issue. The cleaning of paintings and polychromes is an irreversibly invasive intervention; therefore, prior to the implementation of laser cleaning methodologies, a thorough characterization of the interaction between laser pulses and painting components is required. In this work, the modifications induced by irradiation with pulses of 150 picoseconds (at 1064 and 213 nm) and 15 nanoseconds (at 213 nm) on unvarnished aged model egg-yolk-based paints were examined following a spectroanalytical approach. Laser-induced chemical changes on samples of unpigmented and widely used artist's pigment temperas were investigated by spectrofluorimetry and Fourier transform Raman spectroscopy, while color changes were quantified by colorimetry. Noticeable modifications of the Raman and fluorescence bands attributed to pigments are absent except for vermillion, for which the pigment bands tend to disappear upon irradiation at 1064 nm. Interestingly, no discoloration was observed on most of the pigments upon irradiation at 213 nm (150 ps), including the light-sensitive vermillion, while no indications of carbonization or charring of the paint layers, which could give rise to amorphous carbon bands, were obtained at any of the irradiation conditions explored. Comparison of the results using the two different pulse durations and wavelengths illustrates the participation of mechanisms of diverse origin according to the chemical composition of the pigment and highlights the importance of the optimization of the laser parameters, specifically fluence, pulse duration, and wavelength, in conservation treatments of paintings.

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Section: Introductionmentioning

confidence: 99%

Analytical Spectroscopic Investigation of Wavelength and Pulse Duration Effects on Laser-Induced Changes of Egg-Yolk-Based Tempera Paints

et al. 2010

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“…Laser processing of polymers [1][2][3][4] and biomaterials, 5 particularly gelatine, [6][7][8][9][10] collagen-based tissues [11][12][13] such as human cornea, 14 human teeth, 15 as well as laser cleaning of parchment [16][17][18] or leather 19 has attracted vivid attention in recent years. Fs-laser processing of biomaterials has been applied to the fabrication of micro-and nanostructures, pulsed laser deposition, laser direct writing, multiphoton polymerization processes, etc.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser processing of biopolymers at high repetition rate

Gaspard

Forster

Huber

et al. 2008

Phys. Chem. Chem. Phys.

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The large intensities available with femtosecond (fs) laser pulses allow permanent structural modifications in transparent materials with high spatial resolution. Irradiation of self-standing transparent biopolymer films, such as collagen, pure and curcumin doped gelatine employing a 60-fs high-power 11 MHz Ti-Sapphire oscillator laser system linked to an optical microscope led to modifications and ablation. Swelling modifications consisting in the foaming of the irradiated area and formation of a single layer of bubbles arranged around the narrow ablation crater were investigated by optical, scanning force (SFM) and scanning electron (SEM) microscopy. These modifications occur at fluences below the respective ablation thresholds, i.e. ablation processes take place on modified swelled phases. The results are discussed in terms of local temperature increase, generation of thermoelastic stress, physico-chemical effects, and in terms of an incubation model, i.e. the accumulation of these phenomena upon successive pulse irradiation.

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“…cellulose and paper) [6][7][8][9] and very few studies have investigated the effect of radiation on parchment [10][11][12][13]. Therefore in this study a number of complementary scientific techniques are used to compare parchment samples before and after exposure to X-rays using XMT to ensure no detectable change is observed.…”

Section: Introductionmentioning

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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Evaluation of femtosecond laser pulse irradiation of ancient parchment

Cited by 20 publications

References 20 publications

Analytical Spectroscopic Investigation of Wavelength and Pulse Duration Effects on Laser-Induced Changes of Egg-Yolk-Based Tempera Paints

Analytical Spectroscopic Investigation of Wavelength and Pulse Duration Effects on Laser-Induced Changes of Egg-Yolk-Based Tempera Paints

Femtosecond laser processing of biopolymers at high repetition rate

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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