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Title: BEHAVIOUR OF ANIMAL-ORIGIN GELATINS TO ARTIFICIAL AGEING IN THE PROCESS OF RESTORING GILDED WOOD

BEHAVIOUR OF ANIMAL-ORIGIN GELATINS TO ARTIFICIAL AGEING IN THE PROCESS OF RESTORING GILDED WOOD

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Lucretia Miu; Cristina Car?ote; Emanuel Vacalie; Mihaela Niculescu; Nicolae Catrina; Marcel Ionescu
10.5593/sgem2023V/6.2/s25.06
10.5593/sgem2023v/6.2
1314-2704
978-619-7603-66-8
English
23
6.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Advances in Biotechnology
Animal-origin glues are adhesives made by boiling animal tissues for a long time, and from the chemical point of view they are gelatinous and albuminoid protein substances bearing different names. The most frequently used are gelatins. They are extracted from raw animal hide residues, from cartilages, tendons, and from the gelatinous matter extracted from bones, on which the name and quality of gelatin depends. The gelatin extracted from unhaired hide waste/pelt waste resulting from unhairing bovine hide from tanneries was used in this article to study the behaviour to accelerated ageing of two types of gelatins used for gilding some wood samples with gold leaf. In this paper we aimed to find the damaging effects of heat and relative humidity on the gelatines (extracted from bovine hide and rabbit skin) based adhesives used for wood gilding. Therefore, a gold leaf was applied to a fir wood (pine tree) conditioned for ten years using commercial gelatin extracted from rabbit skin as well as gelatin extracted from bovine hide by-products. The gilding technique followed the traditional recipe in which adhesive, multiple layers of plaster, bolus were employed in order to fix the gold leaf. The gilded wood prepared as such was artificially aged in a special Binder-type aging chamber at 60? for 7 days, followed by conditioning in an incubator at 70% R.H., at 25? for 2 days, in nine cycles. The physical–chemical changes of gelatin-based adhesives resulting from these conditions, as well as stratigraphic and microstructural characteristics of gilding layers were analyzed by applying optical microscopy, colorimetric measurements and infrared spectroscopy with attenuated total reflection (FTIR-ATR). The obtained results showed that both gelatins have very good adhesive and structural properties and could be successfully used in the field of conservation and restoration.
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This work was supported by the grants of the Romanian National Authority forScientific Research and Innovation CCCDI - UEFISCDI, project CAPTAN, PN-III-P3-3.5-EUK-2019-0196 / contract no. 253/2021 and by contract no. 4PFE/2021, PNCDI III- Program 1 – Development of the national RD system, Subprogram 1.2-InstitutionalPerformance-RDI excellence funding projects.
conference
https://doi.org/10.5593/sgem2023V/6.2/s25.06
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 28-30 November, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
41-48
28-30 November, 2023
website
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gelatin, gilded wood, conservation, restoration