Laser spectroscopy methods for an 18th century grisaille painting investigation

摘要: This paper presents a study regarding the quality of particular painting techniques - grisaille, black and white colors on thick paper, in case an about 200 years old artwork, using exclusively two analytical laser techniques: Laser Induced Fluorescence (LIF) Breakdown Spectroscopy (LIBS). The investigation aimed identification type colors, other possible specific color (yellow or ochre) compounds (which were not allowed by this technique). results proved again known efficiency each mentioned technique, but also conclusions that could be drawn from correlated experimental data. fast efficient experiment took advantage of: i) double pulse LIBS technique allows more intense signal to acquired,a reduced material consumption, elimination matrix effect; ii) data mapping characterization critical points all over LIF scanning image.