Micro-Raman mapping on polished cross sections: a tool to define the penetration depth of conservation treatment on cultural heritage

2010 ◽  
Vol 41 (10) ◽  
pp. 1254-1260 ◽  
Author(s):  
C. Conti ◽  
C. Colombo ◽  
M. Matteini ◽  
M. Realini ◽  
G. Zerbi
Keyword(s):  
Cultural Heritage ◽  
Penetration Depth ◽  
Cross Sections ◽  
Raman Mapping ◽  
Conservation Treatment

scholarly journals High-resolution 2D Raman mapping of mono- and bicomponent filament cross-sections

Polymer ◽  
2021 ◽  
pp. 124011 ◽  
Author(s):  
E. Perret ◽  
O. Braun ◽  
K. Sharma ◽  
S. Tritsch ◽  
R. Muff ◽  
...  
Keyword(s):  
High Resolution ◽  
Cross Sections ◽  
Raman Mapping

Image analysis for measuring lichen colonization on and within stonework

2009 ◽  
Vol 41 (3) ◽  
pp. 299-313 ◽  
Author(s):  
Claudia GAZZANO ◽  
Sergio E. FAVERO-LONGO ◽  
Enrica MATTEUCCI ◽  
Rosanna PIERVITTORI
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Cultural Heritage ◽  
Cross Sections ◽  
Periodic Acid ◽  
Lichen Species ◽  
Pixel Classification ◽  
Percentage Cover ◽  
Periodic Acid Schiff ◽  
High Resolution Images

AbstractThe suitability of image analysis by colour-based pixel classification to quantify lichen colonization on the surface of and within marble, travertine and mortar stonework has been investigated. High resolution images of lichenized stonework surfaces were acquired at different field sites using a scanner, thus avoiding invasive surveys, and the percentage cover of lichen species was subsequently measured in the laboratory using dedicated software. Furthermore, microphotographs of polished cross-sections of lichenized marble, travertine and mortar, stained using the periodic acid-Schiff (PAS) method to visualize hyphae, were produced by the same software to quantify hyphal spread within the substratum, a parameter which can be used more successfully than the commonly used depth of hyphal penetration to quantify how much the lichen has affected the conservation of a stone substratum. Significant statistical differences in hue, saturation and intensity (HSI) of the lichen thalli and PAS-stained hyphae, with respect to the lithic substrata, allowed the software to discriminate and quantify the lichen species cover on, and hyphal spread within, the three investigated lithotypes. Since such a quantitative approach highlights the volume of influence of lichens on stonework, where bioweathering processes are likely to develop, it could be used to support decisions on the preservation of our stone cultural heritage.

ANALYSIS OF THE IMPACT OF BIOMATERIAL AND THE TECHNOLOGY OF PROSTHETIC CROWNS MANUFACTURING ON THE CONNECTION WITH VENEERING CERAMICS

Tribologia ◽  
2021 ◽  
Vol 293 (5) ◽  
pp. 17-25
Author(s):  
Anna M. RYNIEWICZ ◽  
Andrzej Ryniewicz ◽  
Łukasz Bojko ◽  
Wojciech Ryniewicz
Keyword(s):  
Penetration Depth ◽  
Cross Sections ◽  
Glass Ceramic ◽  
Testing Machine ◽  
Layered Structures ◽  
Micro Hardness ◽  
Hardness Tester ◽  
Cad Cam ◽  
The Impact

The aim of the study is to identify the endurance parameters of prosthetic crowns veneered with dedicated ceramics on metal, glass-ceramic, and ceramic frameworks. Metal frameworks were made using CAD/CAM milling technology and SLM technology, while the glass-ceramic and ceramic frameworks were produced using only the CAD/CAM milling technology. The research materials are samples replicating the layered structures of prosthetic crowns. The veneering procedure must ensure the adhesion of the ceramics to the loadbearing framework. The tests modelling the conditions of concentrated loads during chewing were carried out using the Instron 3345 testing machine. Determination of microhardness in cross-sections through layered structures of crowns was performed using the HMV Micro Hardness Tester. The comparison of force loading the indenter as a function of penetration depth indicates that the value of the maximum depth depends on the configuration of microhardness of the framework and dentine. The zirconium ceramics ZrO2 (3Y-TZP) – veneered with Elephant Sakura silica ceramics – should be indicated as the most advantageous material composition.

scholarly journals Protocol for the Analysis of Cross-Sections from Gilded Surfaces

Heritage ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 2416-2430
Author(s):  
Lucia Burgio ◽  
Thomas Gregory
Keyword(s):  
Cultural Heritage ◽  
20Th Century ◽  
Cross Sections ◽  
18Th Century ◽  
Analytical Techniques ◽  
Number Sequence ◽  
Scientific Analysis ◽  
Cultural Heritage Objects ◽  
Victoria And Albert Museum ◽  
Routine Investigations

This paper describes the protocol currently used at the Victoria and Albert Museum for the scientific analysis of water, oil and lacquer gilding in cultural heritage objects. The purpose of the protocol is to guide scientists, curators and conservators in their routine investigations, and address questions about the characteristics of gilded surfaces, their number, sequence, date, composition and stratigraphic details. Each protocol step is described in detail and is accompanied by practical examples taken from the analysis of an 18th-century Chippendale table and the 20th-century statue of the Spirit of Gaiety. The merits of individual analytical techniques and equipment are also evaluated.

scholarly journals Synchrotron radiation μ X-ray diffraction in transmission geometry for investigating the penetration depth of conservation treatments on cultural heritage stone materials

2020 ◽  
Vol 12 (12) ◽  
pp. 1587-1594 ◽  
Author(s):  
Elena Possenti ◽  
Claudia Conti ◽  
G. Diego Gatta ◽  
Marco Merlini ◽  
Marco Realini ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Cultural Heritage ◽  
Penetration Depth ◽  
X Ray Diffraction ◽  
Crystalline Phases ◽  
X Ray ◽  
Stone Materials ◽  
Transmission Geometry ◽  
Stone Matrix

SR-μTXRD allows studying the position and penetration depth within the stone matrix of crystalline phases formed after inorganic conservation treatments.

scholarly journals Conservation Treatment of Modern Cultural Heritage Rickshaw

2016 ◽  
Vol 32 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Soo Chul Kim ◽  
Jung Hae Park ◽  
Han Ul Jang ◽  
Jae Wan Choi ◽  
Joo Young Ahn
Keyword(s):  
Cultural Heritage ◽  
Conservation Treatment
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