Femtosecond laser cleaning of historical paper with sizing

Ersoy, Tansu; Tunay, Tugba; Uğuryol, Mehmet; Mavili, Gurcan; Aktürk, Selçuk

doi:10.1016/j.culher.2013.07.002

Cited by 28 publications

(9 citation statements)

References 26 publications

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“…Initially, a specific problem within painting conservation, namely the removal of glue-paste adhesive from the reverse side of a painting on canvas, was addressed [114]. Ultrafast laser pulses in the femtosecond range, in some cases also with ultraviolet wavelength, were used for cleaning on a variety of objects from very different material classes, e.g., metals [115,116], painted artifacts [117][118][119], granite [120], parchment [121], paper [122,123], and wooden artworks [124].…”

Section: 21)mentioning

confidence: 99%

Structuring of thin films by ultrashort laser pulses

Krüger

2022

Appl. Phys. A

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Modern life and global communication would not be possible without technologically tailored thin films; they are omnipresent in daily life applications. In most cases, the films are deposited entirely at the carrying substrates in a specific processing step of the device or sample. In some cases, however, removal or modification must be performed locally, i.e., site-controlled and material selective through an additional laser processing step. For that ultrashort laser pulses with durations in the femtosecond and picosecond range can provide unique advantages and capabilities in industrially scalable schemes. This article reviews the current state of the research and corresponding industrial transfer related to the structuring of thin films by ultrashort pulsed lasers. It focuses on the pertinent historic developments, reveals the relevant physical and chemical effects, explores the ultimate limits, and discusses selected industrial and scientific applications.

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Section: 21)mentioning

confidence: 99%

Structuring of thin films by ultrashort laser pulses

Krüger

2022

Appl. Phys. A

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“…Nevertheless, vulnerable art works such as papers have been lately 3-8 subject to laser cleaning. Particularly, ultrashort pulsed lasers yield good results 8 . Occurrence of thermal damage can be prevented by virtue of ultrashort pulse duration.…”

Section: Introductionmentioning

confidence: 99%

High-selectivity cleaning of historical paper samples with sizing through femtosecond laser ablation

et al. 2015

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Laser ablation offers cleaning method for historical and art works effectively. Difference between ablation threshold of contamination layer and the surface yields to remove contaminants from surface without detriment to historical material. In particular, lasers with ultrashort pulse duration are very convenient for brittle historical papers, fibers of which should be intact after cleaning treatment. Since duration of laser irradiation and material interaction is very short, the possibility of damage to the paper is very low. One of the other crucial issues after paper cleaning treatment is color variation on the surface. Authentic color of the historical paper has to be preserved after the procedure. In this paper, we present results of paper cleaning via femtosecond (fs) laser running at a wavelength of 1030 nm. In the first stage of this experimental study, we determined optimum laser parameters on artificially soiled and aged paper samples, then cleaned a handwritten manuscript with 'sizing'. In calligraphy, ornamentation and miniature arts, sizing is applied on paper as a protective layer which increases strength of paper and renders it more useful. Papers with sizing have been prevalently used in Islamic or Ottoman culture. We observed that after laser irradiation, artificial soling layer is effectively removed, while original color of the subs-layers did not alter. We used scanning electron microscopy (SEM) to examine fiber integrity, and determined that the sizing layer was not removed when optimized parameters were used, thus the fibers were not damaged.

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“…During the first hours spent getting familiar with the Nd:YAG laser, the conservators practiced on the churro reference sample and on a large damaged fragment of a Navajo weaving, specifically purchased by the owner for this purpose. Combinations of frequencies (5,10,and 20 Hz) and beam size at the surface were tested and the results were compared, in an effort to determine which parameters would deliver a more consistent and effective cleaning. In order to maintain the fluence of the laser beam below 350 mJ/cm 2 and avoid damage to the substrate, the beam diameter at the surface was kept at or above 5 -7mm.…”

Section: Case Study Laser Cleaning Of a First Phase Navajo Blanketmentioning

confidence: 99%

“…Much of this work involves treatments on paper, such as the abatement of foxing, mold, and soiling [3,5,6,8]. Increased attention has been paid to the treatment of textiles woven from natural fibers, and a number of interesting results show the potential as well as limitations of laser cleaning, particularly for the removal of fine soiling and carbonaceous deposits [1,2,9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Laser cleaning is increasingly used to remove unwanted contamination from the surfaces of historical materials, and has drawn significant interest for such applications on natural and man-made polymers [1][2][3][4][5][6][7][8][9][10]. Much of this work involves treatments on paper, such as the abatement of foxing, mold, and soiling [3,5,6,8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser Cleaning of a First Phase Navajo Wool Chief’s Blanket by Nd:YAG

Londero¹,

Corda²,

Ciofini³

et al. 2017

Proceedings of the International Conference LACONA XI

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A case study was performed for laser cleaning of a soiled First Phase Navajo chief 's blanket using the first and second harmonics of a Nd:YAG laser. A cleaning protocol was developed by mapping the impact of wavelength, fluence, pulse number, and surface pre-wetting on churro wool reference samples. Afterward, an approach for applying the protocol to the Navajo blanket was developed, including a number of custom jigs for mounting the object under controlled tension. The most effective laser cleaning parameters were determined to be a wavelength of 532 nm, a fluence of 350mJ/cm 2 , approximately 100 pulses per cross-sectional area of the laser beam, and no pre-wetting. Good results with no observable damage were obtained with ~280 hours of laser cleaning for the entire blanket, which measured 138 cm by 208 cm.

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Femtosecond laser cleaning of historical paper with sizing

Cited by 28 publications

References 26 publications

Structuring of thin films by ultrashort laser pulses

Structuring of thin films by ultrashort laser pulses

High-selectivity cleaning of historical paper samples with sizing through femtosecond laser ablation

Laser Cleaning of a First Phase Navajo Wool Chief’s Blanket by Nd:YAG

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