Zagadnienie wykorzystania ablacji laserowej w usuwaniu wtórnych nawarstwień z powierzchni dzieł sztuki i obiektów zabytkowych w architekturze The Use of Laser Ablation in the Removal of Secondary Build-up from the Surface of Art Works and Monuments of Architecture
The article discusses problems associated with the use of
laser ablation in the removal of secondary build-up from the
surface of works of art and monuments of architecture as
well as the removal of micro-particles from the surface of
industrial elements.
The prime problem connected with mechanical methods
o f cleaning is the erosion of the original surface located
immediately underneath the build-up, which sometimes
causes irrecoverable losses and gaps in the details (e.g. reliefs,
traces of the instruments used by the sculptor, or traces of
polychromy).
For several years now, the laser method has been successfully
applied for the removal of secondary build-up, also in
Poland, by resorting to laser impulse radiation. A laser impulse
with suitable energy (power) density is capable of
removing, for instance, black crusts from assorted surfaces
without damaging the base, which at times can be more
fragile and delicate than the build-up itself.
The main purpose of the article is to acquaint the reader
with a new technology of removing build-up with the assistance
of laser impulse radiation. The author discusses physical
mechanisms leading to the removal of particles and
b uild-up from the surfaces of assorted material in the course
of the impact of long (100-1000) gs and short (5-100) ns
laser impulses.
The article also considers other effects accompanying the
process of ablation, and presents select research results.
The summary mentions joint features linked with the laser
ablation of different material and the assets and faults of the
application of laser technique in conservation; it also p re sents
the basic principles of safety while working with laser
equipment.
Finally, the au th o r proposes general conclusions associated
with the removal of b u ild -u p with the help of laser
radiation.
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