Hidden pigments in portrait miniatures - purple of cassius

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461446%3A_____%2F20%3AN0000020" target="_blank" >RIV/60461446:_____/20:N0000020 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461446:_____/20:N0000017

Výsledek na webu

<a href="https://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=16&SID=C1f7gecHNzvQoKOxtRs&page=1&doc=1" target="_blank" >https://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=16&SID=C1f7gecHNzvQoKOxtRs&page=1&doc=1</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Hidden pigments in portrait miniatures - purple of cassius

Popis výsledku v původním jazyce

The palettes used by miniature portrait artists included various inorganic and organic pigments. The first miniatures were executed on stretched vellum (parchment); later on, the variability of supports increased (paper, glass, metal, ivory). Watercolour and gouache were the most common techniques. In addition to pigments that did not differ in any way from those used by painters of larger paintings, there were also rarely used pigments, typically appearing just in the miniatures. In the literature, silver white or Purple of Cassius are mentioned, but there is a lack of their clear evidence in actual paintings. In this study, Purple of Cassius was identified in one French portrait miniature from the 19th century due to increased concentration of gold in purple shades of the painting. In addition, the production of Purple of Cassius was replicated combining historical recipes and classical laboratory methods. The applied procedure included dilution of a gold bar in aqua regia and reduction with powdered tin. The prepared pigment was characterized by confocal microscopy and scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) detectors in the bright field mode (BF).

Název v anglickém jazyce

Hidden pigments in portrait miniatures - purple of cassius

Popis výsledku anglicky

The palettes used by miniature portrait artists included various inorganic and organic pigments. The first miniatures were executed on stretched vellum (parchment); later on, the variability of supports increased (paper, glass, metal, ivory). Watercolour and gouache were the most common techniques. In addition to pigments that did not differ in any way from those used by painters of larger paintings, there were also rarely used pigments, typically appearing just in the miniatures. In the literature, silver white or Purple of Cassius are mentioned, but there is a lack of their clear evidence in actual paintings. In this study, Purple of Cassius was identified in one French portrait miniature from the 19th century due to increased concentration of gold in purple shades of the painting. In addition, the production of Purple of Cassius was replicated combining historical recipes and classical laboratory methods. The applied procedure included dilution of a gold bar in aqua regia and reduction with powdered tin. The prepared pigment was characterized by confocal microscopy and scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) detectors in the bright field mode (BF).

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/DG18P02OVV034" target="_blank" >DG18P02OVV034: Neinvazivní výzkum portrétních miniatur pro účely jejich datace, autentikace, prezentace a ochrany</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Acta Artis Academica 2020: The Colour Theme

ISBN

978-80-88366-14-0

ISSN

—

e-ISSN

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Počet stran výsledku

10

Strana od-do

179-188

Název nakladatele

Akademie výtvarných umění v Praze

Místo vydání

Praha

Místo konání akce

Bratislava

Datum konání akce

16. 10. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000646188900014