Mechanisms in Laser Techniques for Art Conservation:
Two Improved Cleaning Methods
Techniques and Systems in Art Conservation
Proc. of SPIE Vol. 4402 - 11 (2001) ISBN 0-8194-4097-3
G Watkins a, Jong-Myoung Lee b and Carmel Curran a
a - Laser Group, Department of Engineering, University
Brownlow Street Liverpool L69 3GH UK.
b - Institute for Advanced Engineering, Yongin, PO Box
of restoration techniques employing lasers is dependent
on the selection of laser wavelength, cover fluid, pulse
duration and method of application. This affects the mechanisms
operating during the removal process and hence its efficiency.
The risk of unwanted side effects will be more or less
controllable depending on the mechanism of removal.
This paper reviews laser removal mechanisms relevant to
art conservation and outlines experimental work on the
cleaning of polluted marble while employing two new cleaning
methods: angular removal and laser shock processing.
These two new methods both show clear advantages over
conventional cleaning at normal incidence. A model for
each method is proposed and the improvement in performance
is quantifed. The relevance of the new techniques to art
conservation is clearly outlined.