TECHNICAL AND TECHNOLOGICAL ASPECTS OF LASER CLEANING OF BOOKS AND DOCUMENTS WITH A PAPER SUBSTRATE
The work is devoted to laser cleaning of books and documents. Technical and technological aspects of laser paper cleaning are considered. A method for the quantitative evaluation of the efficiency of laser cleaning based on the analysis of the digital optical image of the section of a book or document under study before and after its treatment by laser radiation is proposed and experimentally tested. To obtain quantitative data, the digital image is computer processed and its RGB-characteristic is measured. In addition, the article proposes a method of selective laser cleaning of books and documents that allows solving the problem of removing text and graphics from the paper surface in the process of its processing with laser radiation. To solve this problem, it is suggested to use high-precision scanning systems, which makes it possible to exclude from the laser processing area those parts of documents that contain printing paints and inks. The results of the carried out experimental studies confirmed the high efficiency of the proposed technical solutions, which allows them to be recommended for performing practical restoration works.
Authors: S. V. Titov, V. A. Parfenov
Direction: Instrument Engineering and Information-Measurement Technologies
Keywords: Laser cleaning, restoration, books, documentation, paper, selective purification, RGB-characteristic, Nd: YAG laser, foxing
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