Experimental investigation of the laser ablation process on wood surfaces

Panzner, Michael; Wiedemann, Günter; Henneberg, K.; Fischer, Roland; Wittke, T.-H.; Dietsch, R.

doi:10.1016/s0169-4332(97)00743-5

Cited by 43 publications

(36 citation statements)

References 2 publications

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“…Changes in the color and in the chemical and anatomical structure of the modified wood are usually the most intensive at the surfaces directly affected with the laser; they decrease and level off at a minimum distance of 35 to 40 μm (Barcikowski et al 2006). The effect of CO2 laser treatment is mainly caused by thermal processes in wood and changes in the main wood components (Orech and Kleskenová 1975;Panzner et al 1998).…”

Section: Introductionmentioning

confidence: 99%

The Impact of Laser Surface Modification of Beech Wood on its Color and Occurrence of Molds

Vidholdová¹,

Reinprecht²,

Igaz³

2017

BioResources

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Section: Introductionmentioning

confidence: 99%

The Impact of Laser Surface Modification of Beech Wood on its Color and Occurrence of Molds

Vidholdová¹,

Reinprecht²,

Igaz³

2017

BioResources

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“…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]. Therefore, the task is the laser action caused a reduction of the chlorine concentration on the surface as can be seen by a comparison of the chlorine concentration values between Fig.…”

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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“…Panznera et al [3] determined that when timber was cut in a conventional manner, its surface became a thin extruded layer; thus, using an Nd:YAG laser or a TEA-CO 2 laser could improve this process. Lau et al [4] provided a systematic analysis of the Nd:YAG laser and electric discharge machining process for processing composite materials, aiming to improve the processing efficiency.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the optimisation of parameters for the laser machining of timber

Deng

Hsia

2016

Int J Adv Manuf Technol

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Fuzzy-based Taguchi methods were used to optimise the parameters for the CO 2 laser machining of timber. An orthogonal array, the signal-to-noise (S/N) ratio, and the analysis of variance (ANOVA) are employed with reference to process factors. Combining the Taguchi method and fuzzy logic, using the multiple performance characteristics index (MPCI), allowed determining the optimal combination of factors for cutting the timber. The confirmatory test was performed to verify the estimated response.

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Experimental investigation of the laser ablation process on wood surfaces

Cited by 43 publications

References 2 publications

The Impact of Laser Surface Modification of Beech Wood on its Color and Occurrence of Molds

The Impact of Laser Surface Modification of Beech Wood on its Color and Occurrence of Molds

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

Analysis of the optimisation of parameters for the laser machining of timber

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