A comparative study on the color change of pigments due to the consolidation of conventional spectroscopic techniques and laser-induced breakdown spectroscopy

Mostafa, Ayman M.; Hamed, Safa Abd El-Kader Mohamed; Afifi, Hala A. M.; Mohamady, Samia

doi:10.1007/s00339-019-2849-5

Cited by 42 publications

(7 citation statements)

References 33 publications

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“…The elemental composition of painted layer samples was identified by the SEM/EDX analysis (Table1 and Figures 4,5 This suggests that hematite was employed as a red pigment in both statuettes (19). The gold paint layer on statuette no.…”

Section: Sem-edx Microanalysismentioning

confidence: 94%

Coupling of SEM-EDX and Raman spectroscopy to investigate painted preparation layers on two wooden statuettes from Ptolemaic era

Hamouda

El-Hadidi²,

Hamed³

et al. 2023

Egypt. J. Chem.

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Multi-analytical techniques combining SEM-EDX and Raman spectroscopy have been employed in this study to investigate the chemical composition of the preparation layers and pigments applied on two wooden statuettes of the goddess Isis from the Ptolemaic era preserved in Tell Basta's museum storeroom. Furthermore, light microscope was used to identify wood species in both statuettes and FTIR analysis to identify the binding media. Results proved that both statuettes were made of local wood; statuette no. 1408 was carved out of tamarisk wood, while statuette no. 2213 was made of sycamore fig.Preparation layer applied on statuette no. 1408 was predominantly composed of calcium carbonate and gypsum and the statuette no. 2213 was made with calcium carbonate. EDX coupled with Raman results indicate that the pigments used were mostly in accordance with the established Ancient Egyptian palette.

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Section: Sem-edx Microanalysismentioning

confidence: 94%

Coupling of SEM-EDX and Raman spectroscopy to investigate painted preparation layers on two wooden statuettes from Ptolemaic era

Hamouda

El-Hadidi²,

Hamed³

et al. 2023

Egypt. J. Chem.

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“…However, direct application of ZnO nanoparticles can cause alterations in the original appearance. To address this issue, ZnO composites with cellulose ethers have been developed, which maintain the beneficial properties of ZnO while retaining the original aesthetics of the artwork [40,41]. These composites have shown promising results in preventing color fading and inhibiting the growth of fungi on artworks.…”

Section: Introductionmentioning

confidence: 99%

Zinc Oxide Nanoparticles in Leather Conservation: Exploring the Potential of Hydroxypropyl Cellulose/Zinc Oxide Nanocomposite as a Leather Consolidation Agent

Koochakzaei,

Ghane,

Mohammadi Achachluei

2023

Heritage

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This research presents a comprehensive study on the application of hydroxypropyl cellulose/zinc oxide nanocomposite (HPC/ZnO NC) as an effective consolidant in leather conservation. The critical focus is to prevent photooxidative degradation, a significant challenge in preserving historical leather artifacts. The nanocomposite was evaluated for its protective capabilities against environmental stressors like UV radiation and moisture, mechanical robustness, and potential to stabilize acid-damaged leather. The uniform dispersion of ZnO NPs in the HPC matrix was revealed as crucial for improving leather properties, which was confirmed through SEM imaging. The HPC/ZnO NC coating effectively prevented UV-induced microcracks, surface degradation and collagen denaturation. It also demonstrated enhanced mechanical resistance, inhibiting the reduction in leather’s maximum tolerable force and increasing the elongation index, even after aging. Additionally, it exhibited improved water-repellent properties and increased the pH of the leather, offering potential benefits for the treatment of acid-degraded leathers. Overall, the findings affirm that the application of HPC/ZnO NC significantly augments the physical and mechanical properties of leather, providing enhanced resistance to environmental degradation.

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“…In the cleaning process, because the deposited pollutant layer on antique samples has a different thickness, the laser technique does not go beyond the sample layer of damage to the antique surface, which would cause damage to the antique, as it can be controlled by tunning the amount of energy, the duration of pulses, laser wavelengths, the number of pulses emitted each second, and the distance between the laser beam device and the surface to be cleaned. Tuning these parameter allows one to remove a specific amount of layers up to any required depth level with high precision, and the optional selectivity gives the restorer the ability to distinguish layers that will be removed while preserving the original surface [ 14 , 15 , 16 , 17 ]. This process depends on several factors, such as the surface reflection rate and the interconnectedness of its material, and the local application, where the area is cleaned to a direction only.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study between First and Second Harmonics of a Nd:YAG Laser for Cleaning Manifestation Damages That Appeared in Pigments Used on Archaeological Cartonnage

et al. 2023

Self Cite

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This study focused on identifying the effect of the laser wavelengths used in cleaning some manifestation damage appearing in pigments used on archaeological cartonnage preserved in the Egyptian Museum, Egypt. The manifestations of damage appear as mud, resin, color, dust and microbiological damage stains. Lasers were chosen as one of the modern applications that give good results when cleaning the pigment materials without making direct contact with the material. Accordingly, lasers with a wavelength of 532 and 1064 nm were tested to identify their effect on stains caused by pigments and to choose the best one for use in cases similar to those materials in the future. This study was conducted to identify the effect of the selected wavelengths and choose the best ones to apply to the archaeological model. The evaluations were conducted using several tests and analyses, such as digital microscopy, X-ray florescence, Fourier transform infrared spectroscopy, and Handy colorimetry to evaluate that effect of lasers with a wavelength of 532 and 1064 nm to remove stains. The experimental study demonstrated the good effect of the Nd:YAG laser with a wavelength of 1064 nm compared with that of the 532 nm laser. The results of using the Nd:YAG laser proved the good effect of removing all stains compared with the 532 nm laser, which caused big changes when used to clean the stains on the pigment’s surfaces; it also did not help in removing or reducing some stains such as mud stains. According to these results, the good effect of the Nd:YAG laser (1064 nm) make it more suitable for cleaning than that of the Nd:YAG laser (532 nm), which is not recommended for use as it gave bad results when applied.

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A comparative study on the color change of pigments due to the consolidation of conventional spectroscopic techniques and laser-induced breakdown spectroscopy

Cited by 42 publications

References 33 publications

Coupling of SEM-EDX and Raman spectroscopy to investigate painted preparation layers on two wooden statuettes from Ptolemaic era

Coupling of SEM-EDX and Raman spectroscopy to investigate painted preparation layers on two wooden statuettes from Ptolemaic era

Zinc Oxide Nanoparticles in Leather Conservation: Exploring the Potential of Hydroxypropyl Cellulose/Zinc Oxide Nanocomposite as a Leather Consolidation Agent

Comparative Study between First and Second Harmonics of a Nd:YAG Laser for Cleaning Manifestation Damages That Appeared in Pigments Used on Archaeological Cartonnage

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