Limewashed mural paintings as seen by VIS-IR reflectography

2015 ◽  
Author(s):  
R. Fontana ◽  
J. Striova ◽  
M. Barucci ◽  
E. Pampaloni ◽  
M. Raffaelli ◽  
...  
Keyword(s):  
Mural Paintings ◽  
Ir Reflectography

Subsurface imaging for panel paintings inspection: A comparative study of the ultraviolet, the visible, the infrared and the terahertz spectra

2015 ◽  
Vol 23 (1) ◽  
Author(s):  
A. Bendada ◽  
S. Sfarra ◽  
C. Ibarra−Castanedo ◽  
M. Akhloufi ◽  
J.−P. Caumes ◽  
...  
Keyword(s):  
Subsurface Imaging ◽  
Wide Spread ◽  
Ir Thermography ◽  
Complementary Information ◽  
Ir Sensors ◽  
The World ◽  
Panel Paintings ◽  
Temperature Maps ◽  
Illumination Source ◽  
Ir Reflectography

AbstractInfrared (IR) reflectography has been used for many years for the detection of underdrawings on panel paintings. Advances in the fields of IR sensors and optics have impelled the wide spread use of IR reflectography by several recognized Art Museums and specialized laboratories around the World. The transparency or opacity of a painting is the result of a complex combination of the optical properties of the painting pigments and the underdrawing material, as well as the type of illumination source and the sensor characteristics. For this reason, recent researches have been directed towards the study of multispectral approaches that could provide simultaneous and complementary information of an artwork. The present work relies on non−simultaneous multispectral inspection using a set of detectors covering from the ultraviolet to the terahertz spectra. It is observed that underdrawings contrast increases with wavelength up to 1700 nm and, then, gradually decreases. In addition, it is shown that IR thermography, i.e., temperature maps or thermograms, could be used simultaneously as an alternative technique for the detection of underdrawings besides the detection of subsurface defects.

scholarly journals A comparative study on the extraction effects of common agents on collagen-based binders in mural paintings

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Jianghao Du ◽  
Zhanyun Zhu ◽  
Junchang Yang ◽  
Jia Wang ◽  
Xiaotong Jiang
Keyword(s):  
Protein Structure ◽  
Comparative Study ◽  
Protein Extraction ◽  
Guanidine Hydrochloride ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Extraction Process ◽  
Ultraviolet Absorption Spectrum ◽  
Mural Paintings ◽  
The Impact

AbstractIn this paper, a comparative study was conducted on the extraction effects of six agents for collagen-based mural painting binders. These agents were used to extract the residual proteins in the non-aged and thermal aged samples. The protein extraction efficiencies of different extracting agents were quantitatively determined by bicinchoninic acid (BCA) method, and then processed by multivariate analysis of variance (MANOVA). The impact of the extraction process on the protein structure was characterized by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), ultraviolet absorption spectrum (UV) and circular dichroism (CD). The results showed that, for both non-aged and aged samples, the extraction efficiency of 2 M guanidine hydrochloride (GuHCl) was significantly higher than the other five agents, with less damage to the protein structure during the extraction process.

scholarly journals Analytical Approach for the Study of Teotihuacan Mural Paintings from the Techinantitla Complex

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 508
Author(s):  
José Luis Ruvalcaba-Sil ◽  
Luis Barba ◽  
Edgar Casanova-González ◽  
Alejandro Mitrani ◽  
Margarita Muñoz ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Infrared Imaging ◽  
Blue Pigment ◽  
Large Set ◽  
Non Invasive ◽  
Mural Paintings ◽  
Interdisciplinary Research Project ◽  
Manufacturing Techniques ◽  
Materials Used ◽  
The 1960S

Techinantitla building complex, in the Amanalco neighborhood of the ancient city of Teotihuacan, is famous for the iconography and quality of the mural paintings found in this site. A significant part of this heritage has been lost due to looting. In recent years, an interdisciplinary research project was developed to study the limited patrimony that was left. As part of this study, we first employed geophysical techniques to reconstruct the architectural pattern of the compound’s remaining walls, where other paintings may still be found. Then, we applied a non-invasive methodology to characterize a large set of fragments recovered in the 1980s and to gain information on their pigments and manufacturing techniques. This methodology included False Color Infrared Imaging, X-ray Fluorescence and Fiber-Optics Reflectance Spectroscopy, and led to the identification of hematite, calcite, malachite, azurite and an unidentified blue pigment. The results were compared with a previous study performed on a set of Techinantitla mural paintings looted in the 1960s. A broader comparison with contemporary mural paintings from other Teotihuacan complexes shows good agreement in the materials used. These results may suggest a standardization in the making of Teotihuacan mural painting during the Xolapan period (350 to 550 AD).

scholarly journals Improvement of the Non-Destructive Testing of Heritage Mural Paintings Using Stimulated Infrared Thermography and Frequency Image Processing

2019 ◽  
Vol 5 (9) ◽  
pp. 72
Author(s):  
Kamel Mouhoubi ◽  
Vincent Detalle ◽  
Jean-Marc Vallet ◽  
Jean-Luc Bodnar
Keyword(s):  
Infrared Thermography ◽  
Cultural Property ◽  
Wall Paintings ◽  
Non Destructive Testing ◽  
Property A ◽  
Destructive Testing ◽  
Mural Paintings ◽  
Works Of Art ◽  
Optical Effects ◽  
Non Destructive

Within the framework of conservation and assistance for the restoration of cultural property, a method of analysis assistance has been developed to help in the restoration of cultural heritage. Several collaborations have already demonstrated the possibility of defects detection (delamination, salts) in murals paintings using stimulated infrared thermography. One of the difficulties encountered with infrared thermography applied to the analysis of works of art is the remanence of the pictorial layer. This difficulty can sometimes induce detection artifacts and false positives. A method of thermograms post-processing called PPT (pulse phase thermography) is described. The possibilities offered by the PPT in terms of reducing the optical effects associated with the pictorial layer are highlighted first with a simulation, and then through experiments. This approach can significantly improve the study of painted works of art such as wall paintings.

High-resolution 3-D GPR applied in the diagnostic of the detachment and cracks in pre-Hispanic mural paintings at “Templo Rojo”, Cacaxtla, Tlaxcala, Mexico

2021 ◽  
Vol 50 ◽  
pp. 61-72
Author(s):  
J. Ortega-Ramírez ◽  
M. Bano ◽  
L.A. Villa Alvarado ◽  
D. Medellín Martínez ◽  
R. Rivero-Chong ◽  
...  
Keyword(s):  
High Resolution ◽  
Mural Paintings

8. Infrared Reflectography of Edward Hopper’s High Noon: Questions of Authentication

2018 ◽  
Author(s):  
Ian E. Longo
Keyword(s):  
Near Infrared ◽  
Early American ◽  
Edward Hopper ◽  
Private Collection ◽  
The Media ◽  
Catalogue Raisonne ◽  
Infrared Reflectography ◽  
Shed Light ◽  
Ir Reflectography ◽  
High Noon

An unprovenanced oil study, purportedly by the early American realist Edward Hopper (188* -1967), was purchased in 2007 on eBay by a pair of brothers from Ontario. It is a smaller, poorly-executed near-copy of Hopper’s High Noon at the Dayton Art Institute. Given that detailed diary entries by Hopper’s wife, Josephine, note only that four charcoal sketches preceded the final version of High Noon, and fail to mention an oil study, Gail Levin, the author of Hopper’s catalogue raisonné, has conservatively concluded that it can at best be assigned to a dedicated follower. Can Infrared Reflectography of the two paintings shed light on the question of authenticity? Many pigments used by Hopper become transparent in the Near Infrared spectrum, a fact verified by a test-panel. By using a DSLR camera, converted to detect IR, charcoal sketches on the primed canvas of the original were revealed. While IR Reflectography reveals earlier stages in the composition of the authentic High Noon, stages suggested by the charcoal sketches, IR does not provide positive proof for the authenticity of the oil sketch. The issue of authenticity became further complicated when the media, led by the Globe and Mail, took up the case of the owners and overstated the IR results. At present the IR investigation suggests only that the oil study was painted by a follower working from either Josephine’s diary or, more intriguingly, from Hopper’s own sketches, which are held in a private collection.

Preliminary Results of the Er:YAG Laser Cleaning of Mural Paintings

2007 ◽  
pp. 203-210 ◽  
Author(s):  
A. Andreotti ◽  
M. P. Colombini ◽  
A. Felici ◽  
A. deCruz ◽  
G. Lanterna ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Laser Cleaning ◽  
Preliminary Results ◽  
Mural Paintings
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