Non-invasive identification of lead soaps in painted miniatures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F21%3A00533696" target="_blank" >RIV/61388980:_____/21:00533696 - isvavai.cz</a>

Alternative codes found

RIV/60461446:_____/20:N0000019

Result on the web

<a href="http://hdl.handle.net/11104/0316536" target="_blank" >http://hdl.handle.net/11104/0316536</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00216-020-02998-7" target="_blank" >10.1007/s00216-020-02998-7</a>

Result language

angličtina

Original language name

Non-invasive identification of lead soaps in painted miniatures

Original language description

The lack of an appropriate methodology makes numerous important issues related to miniature paintings unresolved—despite the fact that the portrait miniatures of the seventeenth to the nineteenth century represent a highly specific and significant field of European fine art. One of these issues is represented by chemical degradation of miniatures and its analytical evidence. Fragility, variability of the employed materials, and detailed execution make their analysis highly challenging—since no sampling is usually allowed and any change on their surface is immediately noticeable. Therefore, this study focused on finding a fully non-invasive multi-analytical approach to describe degradation processes resulting from the interaction of lead pigments and oils. For this purpose, a representative set of miniature portraits on various supports (ivory, metal, glass) has been selected. For the first time, Pb carboxylates (lead soaps) have been evidenced in miniatures painted in oil and also in a combined technique (gum + oil). Their distribution and crystallinity was described by a combination of X-ray-based (X-ray fluorescence and X-ray diffraction) and micro-spectroscopic methods. At the same time, a number of new findings about the employed painting technique and involvement of various pigments in the degradation processes were obtained. For example, a possible saponification of a mixed Pb-Sn-Sb yellow was indicated for the first time. Although the degradation is clearly at an advanced stage, it has not shown yet any visible symptoms that might warn restorers and curators. Therefore, without targeted analysis, it would remain overlooked.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Name of the periodical

Analytical and Bioanalytical Chemistry

ISSN

1618-2642

e-ISSN

1618-2650

Volume of the periodical

413

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

16

Pages from-to

263-278

UT code for WoS article

000581694200001

EID of the result in the Scopus database

2-s2.0-85092697258