Art in the Service of Science -- Laser Cleaning of Paper -- Laser Cleaning of Metal -- Laser Cleaning Miscellaneous -- Case Studies -- Side Effects -- Pigments, Conservation Layers -- Fundamentals, Innovative Methods -- Working Groups and Networks -- Cleaning Stations and Process Control for Practise -- Spectroscopy for Monitoring and Identification -- Laser Diagnostics.Since 1995, when Costas Fotakis first brought together restorers and scientists to discuss the potential of lasers in art conservation, the field has grown enormously in importance, and today restorers and laser scientists work together to develop new applications. This book presents the more than six dozen research papers prepared for LACONA V (Lasers in Art Conservation), held in Osnabrueck/Germany in September 2003. The fifth congress once again gathers restorers, art historians, museum staff, laser scientists and laser manufacturers. The topics include, among others: laser cleaning of artworks (case studies and side effects), removal of former conservation layers, fundamentals of laser-artwork interaction, online monitoring and process control, laser diagnostics, spectroscopy for monitoring and identification, networks and co-operation projects.