Laser cleaning applied in the restoration of a medieval wooden panel chamber at Pirna

Wiedemann, Günter; Schulz, M.; Hauptmann, Jan; Kusch, Hans-Günter; Müller, Sabine; Panzner, Michael; Wust, Hendrik

doi:10.1016/s1296-2074(00)00133-3

Cited by 12 publications

(2 citation statements)

References 1 publication

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“…They depend on pulse duration, wavelength and number of pulses per spot. Based on previous cleaning investigations for the restoration of a medieval wooden panel chamber, laser fluences should be limited to <1.5 J/cm 2 for the use of 1064 nm laser radiation (and 6 ns pulse duration) to avoid microscopic wood damage [9]. The use of energy densities >100 J/cm 2 leads to significant ablation of beech model material [10].…”

Section: Resultsmentioning

confidence: 99%

Decontamination of biocidal loaded wooden artworks by means of laser and plasma processing

Schmidt¹,

Pentzien²,

Conradi³

et al. 2017

Proceedings of the International Conference LACONA XI

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Many wooden artworks are contaminated by DDT (dichlorodiphenyltrichloroethane) as a result of a surface treatment by means of the liquid preservative Hylotox-59 © . It was used until the end of the 1980s. DDT crystal structures are formed on the wood surfaces by the "blooming" of chlorine compounds. In addition to an aesthetic disturbance, it is assumed that DDT represents a health risk. Even decades after applying, the toxins in the wood preservatives are still detectable because they are of low volatility in many wood samples. Contaminated waste wood with natural biocide ageing, gilded and wood carved elements of an old picture frame and wooden samples with paint layers were provided by the Schlossmuseum Sondershausen. Non-contact procedures using laser and plasma appear reasonable to remove the DDT crystals. During the experiments, health and safety issues for the operator have to be taken into account. The removal of DDT was evaluated employing femtosecond and nanosecond laser radiation and cold atmospheric plasma techniques with different working gases (air, nitrogen, and argon). Before laser application, a chlorine measurement representing the DDT density on the wooden surface is done by X-ray fluorescence (XRF) analysis as reference. After laser processing, the XRF analysis is used again at the same surface position to determine the depletion rate. Additionally, a documentation and characterization of the sample surface is performed before and after laser and plasma treatment using optical microscopy (OM). For plasma processing with various systems a chlorine measurement is done by gas chromatographic-mass spectrometry (GCMS) analysis.

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Section: Resultsmentioning

confidence: 99%

Decontamination of biocidal loaded wooden artworks by means of laser and plasma processing

Schmidt¹,

Pentzien²,

Conradi³

et al. 2017

Proceedings of the International Conference LACONA XI

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“…The cutting of wooden elements was one of the first commercial applications of lasers in the early 1970s [ 6 , 7 , 8 ]. Laser light is now used in woodworking for marking, engraving, surface cleaning [ 9 ], primary wood processing in automated systems [ 10 ], and MDF (medium-density fiberboard) cutting [ 11 , 12 ]. Lasers are widely applied in the furniture industry (e.g., in the production of inlay elements) and toy industry and in the manufacture of decorations and ornaments.…”

Section: Introductionmentioning

confidence: 99%

Infrared Laser Application to Wood Cutting

et al. 2020

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While lasers are widely used across various industries, including woodworking, few studies to date have addressed the issue of cutting fresh wood. In the present investigation, wood stemming from fresh tree branches was cut at different laser powers and beam travel speeds. A fiber laser and a CO2 laser were used for the research. The cellular structures of the cut surfaces were examined, with some of them found to be covered with a layer of compacted, charred cells. This may be a favorable phenomenon, preventing the invasion of pathogens via the wounds caused by laser beam branch cutting in nurseries, plantations, and orchards.

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The Capability of the Laser Application for Selective Cleaning and the Removal of Different Layers on Wooden Artworks

Wiedemann

Pueschner

Wust

et al.

Springer Proceedings in Physics

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Laser cleaning applied in the restoration of a medieval wooden panel chamber at Pirna

Cited by 12 publications

References 1 publication

Decontamination of biocidal loaded wooden artworks by means of laser and plasma processing

Decontamination of biocidal loaded wooden artworks by means of laser and plasma processing

Infrared Laser Application to Wood Cutting

The Capability of the Laser Application for Selective Cleaning and the Removal of Different Layers on Wooden Artworks

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