Characterization of laser cleaning of limestone

The precise and controlled cleaning of polluted limestone sculpture by a Q-switched Nd:YAG laser is described. Acoustic monitoring of the cleaning process is used to demonstrate the selective removal of black crusts from stone surfaces. Results are also presented which show that by applying a thin l...

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Bibliographic Details
Published in:Optics and laser technology 1995-02, Vol.27 (1), p.69-73
Main Authors: Cooper, M.I., Emmony, D.C., Larson, J.
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Durability. Pathology. Repairing. Maintenance
Exact sciences and technology
laser cleaning
lasers (Nd:YAG)
limestone
Miscellaneous
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Summary:The precise and controlled cleaning of polluted limestone sculpture by a Q-switched Nd:YAG laser is described. Acoustic monitoring of the cleaning process is used to demonstrate the selective removal of black crusts from stone surfaces. Results are also presented which show that by applying a thin layer of water to the surface of the crust prior to irradiation, cleaning can be achieved at a lower energy than with normal laser cleaning. The probability of damage to the underlying stone is, therefore, reduced.
ISSN:0030-3992
1879-2545
DOI:10.1016/0030-3992(95)93962-Q