期刊
JOURNAL OF CULTURAL HERITAGE
卷 1, 期 -, 页码 S233-S240出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/S1296-2074(00)00177-1
关键词
laser; surface cleaning; parchment surface; spectroscopy
类别
资金
- EUREKA [EU 1681]
- EU TMR [FMRX-CT98-0188]
- 'Fonds der Chemischen Industrie im Verband der Chemischen Industrie e.V.', Frankfurt am Main, Germany
Potentials and limitations of the near-UV pulsed laser cleaning of parchment (wavelength 308 nm, pulse duration 17 ns) are demonstrated by the application of scanning electron microscopy (SEM), colour metrics and diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) at model contamination: pigment: parchment systems. Pigment-binder systems stable and unstable against near-UV laser treatment could be identified. A chemical degradation threshold fluence of a goat parchment model substrate was determined which practically coincided with its ablation threshold fluence. This indicates that the fluence range of destructionless laser cleaning at 308 nm is almost not impaired by chemical modfications below the ablation limit. Nevertheless, spectroscopic diagnostics are necessary to guarantee destructionless cleaning for practical cases where the chemical conversion threshold fluence deviates from the ablation threshold to lower values. (C) 2000 Editions scientifiques et medicales Elsevier SAS
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