Temperature-related degradation and colour changes of historic paintings containing vivianite

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F15%3A00442179" target="_blank" >RIV/61388980:_____/15:00442179 - isvavai.cz</a>

Alternative codes found

RIV/67985556:_____/15:00442179 RIV/00216208:11310/15:10292590

Result on the web

<a href="http://dx.doi.org/10.1016/j.saa.2014.12.082" target="_blank" >http://dx.doi.org/10.1016/j.saa.2014.12.082</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.saa.2014.12.082" target="_blank" >10.1016/j.saa.2014.12.082</a>

Result language

angličtina

Original language name

Temperature-related degradation and colour changes of historic paintings containing vivianite

Original language description

Temperature-related degradation of pure synthetic as well as partly oxidised natural vivianite has been studied by high-temperature X-ray diffraction (HT-XRD) covering the whole extent of the temperature-related stability of its structure. While temperatures around 70°C are already damaging to vivianite, exposition to 160°C results in complete amorphisation of both the vivianite and its oxidation products. As indicated by Mossbauer spectroscopy, temperature-induced oxidation of vivianite starts at 90°C. To study the occurring structural as well as accompanying colour changes in more detail, model vivianite paint layer samples with different historic binders were prepared and subjected to increased temperatures. Exposition to 80°C caused pronounced colour changes of all the samples: ground natural blue vivianite became grey - a colour change which has been described in actual works of art. Regarding the binders, the oil seemed to facilitate the transfer of heat to vivianite's grains. To simulate conditions of conservation treatment under which the painting is exposed to increased temperatures, oil-on-canvas mock-ups with vivianite were prepared and relined in a traditional way using iron. The treatment affected preferentially larger grains of vivianite the micro-samples documented their change to grey, and their Raman spectra showed the change from vivianite to metavivianite.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/GAP103%2F12%2F2211" target="_blank" >GAP103/12/2211: Methods for multimodal image processing based on mathematical models of optical properties of paint materials for artwork analysis</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

ISSN

1386-1425

e-ISSN

—

Volume of the periodical

140

Issue of the periodical within the volume

APR

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

101-110

UT code for WoS article

000350939200012

EID of the result in the Scopus database

2-s2.0-84937107577