Fading and showing mechanisms of ancient color relics based on light scattering induced by particles

Zheng, Lizhen; Liang, Xuemei; Li, S. R.; Li, Y. H.

doi:10.1039/c7ra11923b

Cited by 12 publications

(13 citation statements)

References 27 publications

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“…As color variation is the most important index to painting degradation, 29 the chromatic values of the UV aged model paint samples are established after different aging times. From the macropictures of pure minium powder in Figure 1A, it is…”

Section: Color Variation Of Uv Aged Model Paint Samplesmentioning

confidence: 99%

Degradation of red lead pigment in the oil painting during UV aging

Zhao

Wang

Pan

et al. 2019

Color Research & Application

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The degradation product and mechanism of red lead pigment (Pb 3 O 4 , minium) in pure powder and in modeled oil painting are dynamically tracked during ultraviolet light aging by the change of color, crystal structure, chemical composition, and surface morphology. After UV aging, the color of pure minium pigment gradually darkens from bright orange-red into black, but the color of model paint samples made by minium and tung oil binder changes into brownish and whitish color (ΔE * = 56.60). After aging, the crystal structure of Pb 3 O 4 powder is proved to transfer into plattnerite (β-PbO 2 ) by X-ray diffraction (XRD) pattern, but the degradation product of Pb 3 O 4 in model paint samples is identified as 2PbCO 3 ÁPb(OH) 2 by the noticeable peaks at 24.8 , 27.4 , and 34.3 in XRD pattern, and two new Fourier transform infrared peaks at 1393 cm −1 and 682 cm −1 attributed to the presence of CO 2 − 3 , and a new peak at 1051 cm −1 in Raman spectroscopy. During UV aging, the model paint samples' surface is verified gradually from wrinkled surface into nanoscale sheet-like structure and finally a regular hexagonal plate-like crystal structure, showing hexagonal crystals of hydrocerussit 2PbCO 3 ÁPb(OH) 2 . This reveals the interaction between organic tung oil binder and inorganic minium to accelerate the degradation of Pb 3 O 4 pigment. Therefore, the degradation mechanism is deduced as that CO 2 and H + formed by oxidizing ester/carboxyl groups in tung oil reacts with Pb 2+ to yield the white product of 2PbCO 3 ÁPb(OH) 2 . It is believed that this study will contribute much to the complete understanding of the degradation of minium pigment in oil paintings. K E Y W O R D Sdegradation mechanism, oil painting, pigment, red lead (Pb 3 O 4 ), UV light aging

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Section: Color Variation Of Uv Aged Model Paint Samplesmentioning

confidence: 99%

Degradation of red lead pigment in the oil painting during UV aging

Zhao

Wang

Pan

et al. 2019

Color Research & Application

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“…Previous literature has con rmed that shortening the incident light pathway is the fundamental factor leading to blurring of the image [30]. From Fig.…”

Section: Resultsmentioning

confidence: 78%

“…It is proposed that the lling materials form an EC lm that adheres to the rough surface of the microbubble. In addition, the difference between the refractive index of the rough interfacial particles and lling materials decreases leading to less light scattering and enhancing the clarity of the image [30].…”

Section: Conservation Applications Of Ecmentioning

confidence: 99%

The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyl cellulose and Microrepair Method

Jia

et al. 2020

Preprint

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Microbubble disease observed in cellulose acetate microfilm is accompanied by the production of vinegar syndrome, which affects the image integrity. In the present study, samples of cellulose acetate microfilm with microbubble disease were selected to investigate potential treatment methods. Samples were sourced from the Republic of China (AD 1912-1949) microfilm collections held in the Second Historical Archives of China. A combination of optical microscopy and a stainless-steel needle was used to remove plasticizer exudation within microbubbles. The plasticizer was effectively removed by infiltrating butan-1-ol into the microbubble from a small hole made by the stainless-steel needle. SEM and confocal microscopy were used to study the morphology and roughness of the internal surface of the microbubbles. It was found that the blurry image could be attributed to light scattering from the rough surface. Ethyl cellulose was used to fill the interior of the microbubble to obtain a clearer image. To determine the protective potential of this filling material, the chemical and mechanical properties of coated film after dry heat, hygrothermal and UV accelerated ageing were measured. Based on the above-mentioned results, it is encouraging that a new microrepair method and its corresponding method are offered in film treatment work.

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“…Previous literature has con rmed that the shortening of incident light pathway is the fundamental factor leading to blurring of the image [30]. From Fig.…”

Section: Conservation Procedures and Characterization Methodsmentioning

confidence: 78%

“…It is proposed that the lling materials form an EC lm that adheres to the rough surface of the microbubble. In addition, the difference between the refractive index of rough the interfacial particles and lling materials decreases leading less light scattering and enhancing the clarity of the image [30].…”

Section: Conservation Applications Of Ecmentioning

confidence: 99%

The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyecellulose and Microrepair Method 

Jia

et al. 2020

Preprint

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Microbubble disease observed in cellulose acetate microfilm was accompanied by the production of vinegar syndrome, which has a negative influence on the integrity of image. In the present study, cellulose acetate microfilm with microbubble disease from the Republic of China (AD 1912-1949) collected in the Second Historical Archives of China was chosen as a prototype to investigate its treatment methods. A combination of optical microscopy and a stainless-steel needle was used to remove plasticizer exudation within microbubbles. The plasticizer was effectively removed by infiltrating butan-1-ol into the microbubble from a small hole made by the stainless-steel needle. The SEM and laser confocal microscopy were used to study the morphology and roughness of the internal surface of microbubble. It was found that the blurry image could be attributed to the light scattering from the rough surface. Based on the advantages of ethyl cellulose in conservation science, the optimal concentration of ethyl cellulose was selected and used to fill the interior of the microbubble to obtain a clearer image. To determine the protective potential of this filling material, the chemical and mechanical properties of coated film after dry heat, hygrothermal and UV accelerated ageing were measured. Based on the above-mentioned results, it is encouraging that a new microrepair method and its corresponding method are offered in film treatment work.

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Fading and showing mechanisms of ancient color relics based on light scattering induced by particles

Abstract: Faded ancient color relics caused by particle light scattering could be shown by filling with trace non-volatile liquid.

Cited by 12 publications

References 27 publications

Degradation of red lead pigment in the oil painting during UV aging

Degradation of red lead pigment in the oil painting during UV aging

The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyl cellulose and Microrepair Method

The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyecellulose and Microrepair Method

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Fading and showing mechanisms of ancient color relics based on light scattering induced by particles

Abstract: Faded ancient color relics caused by particle light scattering could be shown by filling with trace non-volatile liquid.

Cited by 12 publications

References 27 publications

Degradation of red lead pigment in the oil painting during UV aging

Degradation of red lead pigment in the oil painting during UV aging

The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyl cellulose and Microrepair Method

The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyecellulose and Microrepair Method&nbsp;

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The Treatment of Microbubble Disease of 20th Century Cellulose Acetate Microfilm: Application of Ethyecellulose and Microrepair Method