ABSTRACT
Nowadays, application of laser technique gives the possibility of almost full control of the encrustation removal process at the surface of works of art. Selective and precise interaction of the light beam is the fundamental advantage of a non-invasive treatment of more or less tightly packed unwanted surface layers. Laser cleaning is becoming more and more popular when it comes to dirt removal. This method is non-contact, selective, local, controllable, self-limiting, gives immediate feedback and preserves even the gentlest of reliefs-the trace of a paintbrush (Salimbeni et al. 2000). At present the thickness of varnish can be controlled on-line (Gora et al. 2006).
