Laser cleaning in art restoration

Gobernado-Mitre, I.; Medina, Jesús; Calvo, B.; Prieto, Á. C.; Leal, L.A.; Perez, B. Lopez; Marcos, Fernando Rubio; Baraja, Angel Máximo de Frutos

doi:10.1016/0169-4332(95)00461-0

Cited by 32 publications

(2 citation statements)

References 8 publications

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“…Of relevance to the present work, LIBS has been used for the characterization of a wide variety of objects of artistic or historic interest. 7 Studies of m arble, 8,9 limestone, 10 stained glass, 11 and painted artworks [12][13][14][15][16] have re-cently appeared. In addition to the initial characterization of the object, LIBS can provide a real-time, in situ snapshot of the surface layers being ablated, thus allowing the conser vator a guide to the progress of the restoration and a quantitative indication of when the cleaning is complete.…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy for the Analysis of 150-Year-Old Daguerreotypes

et al. 2002

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Laser-induced breakdown spectroscopy, or LIBS, has been used to characterize the elemental composition of the surface and interior of nineteenth-century, metal-based photographs called daguerreotypes. A surface plasma was produced by the infrared beam of a nanosecond Nd:YAG laser and the emitted light was dispersed in a monochromator to yield the spectroscopic identification of elements. Major components of the daguerreotype surface included silver, copper, and gold. The gold was only present on the surface, as evidenced by its absence after the first one or two laser shots. Minor components such as silicon, aluminum, calcium, and magnesium reflect contaminant particles arising primarily from the cover glass. Several “colored” or “tinted” daguerreotypes were analyzed and the pigments identified. Depth profiling, accomplished by monitoring the spectra as a function of multiple laser shots, allowed the thickness of the silver layer to be measured as the ablation laser “drilled” into the surface. The LIBS technique is shown to be useful in understanding the composition of daguerreotypes and for identifying the specific pigments used by the photographer. These data also provide a scientific basis for attempts to optimize laser cleaning of tarnished daguerreotypes and may also provide clues to the provenance of particular examples.

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Section: Introductionmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy for the Analysis of 150-Year-Old Daguerreotypes

et al. 2002

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“…Raman microscopy has been employed in a study to test the sensitivity of various pigments to UV laser light [123] and to monitor the integrity of underlying stone when being cleaned with pulsed NIR radiation [124]. Others have determined the limits of detection for Raman spectroscopy when analysing mixtures of calcite, gypsum and aragonite (orthorhombic CaCO 3 ) [125].…”

Section: Conservation and Ancient Technology Studiesmentioning

confidence: 99%

Raman microscopy in art history and conservation science

Smith¹,

Clark²

2001

Studies in Conservation

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Numerous applications of Raman microscopy in art history and conservation science have appeared in the literature, but unfortunately this work has gone largely unrecognized by practitioners in those fields. This article assesses the causes of this situation and seeks to inform conservators, art historians and archaeologists of the role that Raman microscopy is playing in the analysis of historical materials. A brief description of the Raman scattering phenomenon and the instrumentation used to collect Raman spectra is presented, and the capabilities and limitations of the technique are discussed. Importantly, a comprehensive and critical review is provided of Raman microscopy applications in the technical analysis of art and artefacts.

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