Busca
Resultados da Busca
-
Journal article
Raman investigation of the structural changes during alteration of historic glasses by organic pollutants
The combination of an unstable glass composition, fluctuating humidity and a high concentration of organic pollutants is responsible for the widespread alteration of part of the glass collections of the National Museums of Scotland (NMS). The alteration has resulted in the formation of crystalline corrosion at the surface and strong...Robinet, L ; Eremin, Katherine ; Coupry, Claude ; Hall, Christopher
-
Journal article
Non-destructive analysis of nineteenth century Scottish calotype negatives and salt prints
The combination of Raman spectroscopy and Secondary Ion Mass Spectrometry can improve understanding of the chemistry of the glass alteration process. Formic and acetic acids play an important role in the alteration of museum glass objects placed in a humid atmosphere. Raman spectroscopy indicates that the soda-rich glass structure is...Robinet, L ; Eremin, Katherine ; Fearn, Sarah ; Pulham, C ; Hall, Christopher
-
Book chapter
Understanding glass deterioration in museum collections: a multi-disciplinary approach
Raman spectroscopy and secondary ion mass spectrometry were used to investigate chemical and structural changes in soda and soda-lime glass exposed to organic pollutants under ambient and accelerated ageing conditions. Raman spectroscopy reveals modification of the glass structure non-destructively, in situ, and as a function of depth. The pollutants caused...Robinet, L ; Fearn, Sarah ; Eremin, Katherine
Raman spectroscopy, deteriorated glass, soda silicate glass, secondary ion mass spectrometry, and organic pollutants
-
Book chapter
Conservation and analysis of deteriorating nineteenth and twentieth-century British glass in the National Museums of Scotland
The National Museums of Scotland collections includes about 2000 19th and 20th-century British glass artefacts. An initial conservation survey in 1996 identified 153 artefacts as actively deteriorating (Cobo del Arco 1999). Examinations of additional artefacts is ongoing and 212, c.20% of those surveyed to date, are deteriorating. The visible signs...Eremin, Katherine ; Cobo del Arco, B ; Robinet, L ; Gibson, L T
-
Journal article
Effect of organic acid vapors on the alteration of soda silicate glass
Organic acids were previously shown to be involved in the alteration of historic soda silicate glasses in humid atmospheres under museum storage conditions. The present study investigates the role of these pollutants on the visual, compositional and structural modification of soda silicate glasses. Replica glasses aged in humid or humid/acidic... -
Journal article
The use of Raman spectrometry to predict the stability of historic glasses
In the National Museums of Scotland (NMS) widespread alterations have been observed in the glass collections of 19th to 20th century, affecting British, Islamic and Asian glasses. It is important for museums to be able to distinguish between stable and unstable glasses, so that particular care can be taken to...Robinet, L ; Eremin, Katherine ; Coupry, Claude ; Hall, Christopher
alkali silicate, elemental composition, stability, and historic glass
-
2004
Journal article
A Raman spectroscopic study of pollution-induced glass deterioration
White crystalline deposits were present on a large number of 19th and 20th century British glass artefacts in the National Museums of Scotland collections. Analysis of these deposits by ion chromatography showed that sodium and formate were the dominant ions. Raman spectroscopy identified sodium formate anhydrate phase II as the...Robinet, L ; Eremin, Katherine ; Cobo del Arco, B ; Gibson, L T
sodium formate, glass corrosion, ion chromatography, pollutant gas, and micro‐Raman spectroscopy
-
2008
Book chapter
Raman spectroscopy, a non-destructive solution to the study of glass and its alteration
This paper presents the potential of Raman spectroscopy, a non-destructive technique which can be applied in-situ, for the analyses of glass and their alteration. Recent analytical developments are summarised for different glass composition and practical examples are given. The paper describes how to extract compositional information from the glass, first...Robinet, L ; Neff, D ; Bouquillon, A ; Pagès-Camagna, S ; Verney-Carron, A …
Glaze, Glass, Conservation , Alteration, Smalt, and Spectroscopy
-
2009
Journal article
Alteration of soda silicate glasses by organic pollutants in museums: Mechanisms and kinetics
The role of the organic pollutants formic acid, acetic acid and formaldehyde in the alteration of unstable soda silicate glasses is examined through SIMS depth profiling of replica glass aged in polluted and non-polluted atmospheres under ambient conditions. The effect of different controlled atmospheres is compared to the polluted atmosphere...