Interaction of femtosecond laser pulses with tempera paints

Gaspard, S.; Oujja, M.; Moreno, Pablo; Méndez, C.; García, Ana Victoria Torres; Domingo, Concepción; Castillejo, Marta

doi:10.1016/j.apsusc.2008.07.205

Cited by 28 publications

(33 citation statements)

References 29 publications

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“…For ns irradiation, the fluence range to be used in each case has to overcome the threshold for removal of contaminants and is limited by the morphological and chemical modification thresholds of the substrate [9]. More recently shorter laser pulses of femtosecond (fs) duration have been proposed as advantageous for laser cleaning of light photosensitive molecular substrates pertaining to cultural heritage such as paintings and polychromes [12][13][14]. In the present work we present a study on the interaction of ancient parchment with 120 fs laser pulses at the wavelengths of 795 and 398 nm and a comparison with results obtained using laser pulses of 6 ns at 532 and 355 nm.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of femtosecond laser pulse irradiation of ancient parchment

Walczak

Oujja

Crespo-Arcá

et al. 2008

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Evaluation of femtosecond laser pulse irradiation of ancient parchment

Walczak

Oujja

Crespo-Arcá

et al. 2008

Applied Surface Science

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“…When adding the pigments, changes are observed in the intensity and maximum position of the fluorescence of the gum arabic, due to the interactions between the binder and pigments. The fluorescence from rabbit skin glue can also be attributed to the products of photo-oxidation, combinations and modifications of amino acids from proteins found in collagen (tryptophan-free) [32][33][34][35] and it is also influenced by the pigment-binder interactions.…”

Section: Spectrofluorimetrymentioning

confidence: 99%

Hyperspectral imaging, spectrofluorimetry, FORS and XRF for the non-invasive study of medieval miniatures materials

et al. 2014

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Background: Illuminated manuscripts are complex multi-layer and multi-material objects. To this difficulty, from the analytical point of view, is added the impossibility of removing samples from these paintings for the study of their materials and techniques. There are relatively few analytical methods that satisfy these constraints as the availability of non-invasive techniques adapted to painted manuscripts is limited and mainly focused on the characterization of inorganic compounds. In the context of a research project on the analytical study of the forty miniatures in the Marcadé collection (Treasury of the Saint-André Cathedral of Bordeaux, XIII to XVI century), the potential of two non-invasive methods, hyperspectral imaging (HSI) and spectrofluorimetry is explored. Results: The methodological development of these techniques as well as preliminary tests on miniatures recreated according to medieval recipes and materials, allowed the validation of the analytical parameters and the creation of a database of reference spectra (parchments, pigments, binders). Hyperspectral imaging associates reflectance spectra with each pixel of the image and treats the signal received in various wavelengths. The characteristics of the spectral signal in VIS range or NIR are used to get an identification and a localization of the components. It allows the study of the entire image and offers lots of ways to work: comparison of spectra, mapping, principal component analyses and false color images. Spectrofluorimetry is a sensitive method which gives information on fluorescent organic compounds under UV or visible light. Emission and excitation spectra of five red pigments in binding media have been collected. These methods were compared with X-ray fluorescence spectrometry for the qualitative analysis and mapping of the inorganic elements in a facsimile which had been purposely reproduced by an illumination painter who worked with original medieval recipes for the sake of developing the present study. Conclusions: The combination of all these techniques allows good identification of all the materials used on an illuminated manuscript. The pertinent selection of the wavelengths used with the HSI system and a preliminary database and study of materials under UV and white light is described in this paper.

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“…Svanberg et al [19] have used a portable LIF system to detect surface treatments and biodeterioration layers on the stone façades of historical buildings. Due to the difficulties associated to the full identification of materials by LIF, this technique is often used in combination with other spectroscopies such as Raman, as the later can provide highly specific information on molecular composition that is complementary to the data obtained by LIF [13][14][15]18]. In particular, Fouriertransform Raman spectroscopy (FT-Raman) overcomes the difficulties associated with the sometimes intense background fluorescence that accompanies the Raman signal [20].…”

Section: Introductionmentioning

confidence: 99%

“…Other non-destructive laser spectroscopies such as laser induced fluorescence (LIF) and Raman are widely used in the analysis of cultural heritage substrates. LIF is a sensitive technique, shown in several cases to be useful for identifying differences in organic and inorganic substrates on the basis of their characteristic molecular emission bands [12][13][14][15][16][17][18]. Svanberg et al [19] have used a portable LIF system to detect surface treatments and biodeterioration layers on the stone façades of historical buildings.…”

Section: Introductionmentioning

confidence: 99%