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Proceedings Paper

Laser paper cleaning: the method of cleaning historical books
Author(s): Evangelini Zekou; Ioannis Tsilikas; Elias Chatzitheodoridis; Alexander A. Serafetinides
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Paper Abstract

Conservation of cultural heritage treasures is the most important issue for transferring knowledge to the public through the next generation of students, academics, and researchers. Although this century is authenticating e-books and information by means of electronic text, still historical manuscripts as content as well as objects are the main original recourses of keeping a record of this transformation. The current work focuses on cleaning paper samples by the application of pulsed light, which is interventional. Experiments carried out using paper samples that are artificially colonized with Ulocladium chartarum. Paper is treated by Nd:YAG laser light. The available wavelength is 1064 nm, at various fluences, repetition rates and number of pulses. Two types of paper are stained with fungi colonies, which grow on substrates of clean paper, as well as on paper with ink text. The first type of paper is Whatman No.1056, which is closer to pure cellulose. The second type of paper is a page of a cultural heritage book published in 1926. Cleaning is performed using laser irradiation, thus defining the damage threshold of each sample. The treatment on paper Watman showed a yellowing, especially on areas with high concentration of fungi. The second sample was more durable to the exposure, performing the best results at higher fluences. Eventually, the paper samples are characterized, with optical microscopy and SEM/EDX analyses, prior to and after cleaning.

Paper Details

Date Published: 5 January 2017
PDF: 10 pages
Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 1022605 (5 January 2017); doi: 10.1117/12.2262426
Show Author Affiliations
Evangelini Zekou, National Technical Univ. of Athens (Greece)
Ioannis Tsilikas, National Technical Univ. of Athens (Greece)
Elias Chatzitheodoridis, National Technical Univ. of Athens (Greece)
Alexander A. Serafetinides, National Technical Univ. of Athens (Greece)

Published in SPIE Proceedings Vol. 10226:
19th International Conference and School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Albena Daskalova; Alexandros Serafetinides, Editor(s)

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