[article] 
inStudies in conservation > Vol.70 N°7-8(2025; October-November) (2025-10-01) . - P. 640-646

Titre :	Hazardous Hues : Identification of Arsenic Present in a Range of Colours Found on Historic Archival Material in the Collection of Parks Canada
Type de document :	texte imprimé
Auteurs :	Timothy Greening (19..-....), Auteur
Année de publication :	2025
Article en page(s) :	P. 640-646
Langues :	Anglais (eng)
Catégories :	Archives -- Conservation et restauration -- Canada Arsenic -- Toxicologie Colorants synthétiques -- Toxicologie Pigments -- Identification Pigments -- Toxicologie Spectroscopie de fluorescence Spectroscopie des rayons X
Index. décimale :	7.025 Dommages. Conservation. Protection
Résumé :	Since late 2019, Parks Canada has been active in the identification of hazardous materials in the collection under the care of the Indigenous Affairs and Cultural Heritage Directorate, using non-destructive XRF analysis. This method of analysis can detect elements of concern including lead, mercury, cadmium, and arsenic. In the case of arsenic, selected case studies show that arsenic is found in more places than initially expected. This paper outlines the XRF analysis of collections materials expected to be found in library and archives, and discusses the visual identification of arsenic, based on the colour of the material. Arsenic yellows (orpiment and/or realgar) were not positively identified in this survey, nor was cobalt violet (cobalt arsenate). A copper-arsenic green, likely emerald green, was occasionally detected. In addition, both a green ink distinct from typical arsenical greens, and dark reds were shown to contain varying levels of arsenic on paper artefacts during this survey. This paper posits the use of early synthetic organic pigments as an explanation for the presence of arsenic in the artefacts under investigation. Historical research indicates that aside from the colours green and yellow, arsenic can also be found in materials in the red and mauve colour families, from arsenic used in the synthesis of aniline dyes.
En ligne :	https://www.tandfonline.com/doi/full/10.1080/00393630.2025.2465954

[article] Hazardous Hues : Identification of Arsenic Present in a Range of Colours Found on Historic Archival Material in the Collection of Parks Canada [texte imprimé] / Timothy Greening (19..-....), Auteur . - 2025 . - P. 640-646.
Langues : Anglais (eng)
in Studies in conservation > Vol.70 N°7-8(2025; October-November) (2025-10-01) . - P. 640-646

Catégories :	Archives -- Conservation et restauration -- Canada Arsenic -- Toxicologie Colorants synthétiques -- Toxicologie Pigments -- Identification Pigments -- Toxicologie Spectroscopie de fluorescence Spectroscopie des rayons X
Index. décimale :	7.025 Dommages. Conservation. Protection
Résumé :	Since late 2019, Parks Canada has been active in the identification of hazardous materials in the collection under the care of the Indigenous Affairs and Cultural Heritage Directorate, using non-destructive XRF analysis. This method of analysis can detect elements of concern including lead, mercury, cadmium, and arsenic. In the case of arsenic, selected case studies show that arsenic is found in more places than initially expected. This paper outlines the XRF analysis of collections materials expected to be found in library and archives, and discusses the visual identification of arsenic, based on the colour of the material. Arsenic yellows (orpiment and/or realgar) were not positively identified in this survey, nor was cobalt violet (cobalt arsenate). A copper-arsenic green, likely emerald green, was occasionally detected. In addition, both a green ink distinct from typical arsenical greens, and dark reds were shown to contain varying levels of arsenic on paper artefacts during this survey. This paper posits the use of early synthetic organic pigments as an explanation for the presence of arsenic in the artefacts under investigation. Historical research indicates that aside from the colours green and yellow, arsenic can also be found in materials in the red and mauve colour families, from arsenic used in the synthesis of aniline dyes.
En ligne :	https://www.tandfonline.com/doi/full/10.1080/00393630.2025.2465954