Notice catalographique « Exploring the role of the substrate in the fading and reversion behaviour of prussian blue dye »
- Titre
- Exploring the role of the substrate in the fading and reversion behaviour of prussian blue dye
- Auteur ou éditeur
- Zweifel, Sophia
- Queen's University (Kingston, Ont.)
- Lieu de publication
- Kingston, Ont.
- Maison d'édition
- The University
- Date de publication
- 2015
- Collation
- 45 p. : col. ill. ; 28 cm.
- Série
- Queen's University (Kingston Ont.). Master of Art Conservation. Research Report
- Résumé
- The pigment Prussian blue (ferric ferrocyanide) is known to exhibit phototropic behaviour due to its isotropic structure. Under prolonged exposure to light or in the absence of oxygen, Prussian blue will fade to Pruissian white as its ferric iron is reduced to the lower oxidation state of ferrous iron. The compound will revert back to Prussian blue when re-exposed to dark, ambient conditions. While the fading and reversion mechanism of Prussian blue dye is largely understood, these behaviours are complicated by environmental conditions, by the presence of production additives, as well as by the substrate upon which it is suffused. For example, it remains undetermined if a proteinaceous substrate might infludence the reduction-oxidation reaction of Prussian blue differently than would a cellulosic substrate. This is particularly important in the case of Prussian blue dye, which was of common use during the nineteenth century. Determining the degree and rate of colour change of Prussian blue dye on different substrates will yield significant information that could help refine more specific display guidelines for artifacts, as well as quantify the risks involved in the anoxic treatment of Prussian blue textiles. This study analysed the role of the substrate in the fading and reversion of Prussian blue dye by measuring the degreee and rate of Prussian blue fading and reversion across samples of different subtrates (cotton and silk). Samples were exposed to light using a microfade tested under ambient conditions as well as under anoxia. A second set of samples was exposed over a twenty-day period under regular and anoxic conditions in an LED light chamber at 100klux. The colour change of these samples was measured using a portable spectrophotometer. Under ambient conditions, silk samples exposed to both LED light and to microfade testing were found to exhibit significantly greater overall colour change than cotton samples. The subtrate was found to be a less significant varialbe in the fading of Prussian blue dye under anoxic conditions. Finally, the experiment demonstrated a discrepancy in results between silk samples exposed to microfading and silk samples exposed in the LED light chamber, suggesting that the intensity of the light source has an effect on the reduction behaviour of Prussian blue on silk (rather than overall dosage alone). This is a significant factor to consider if constructing future experiments that seek to mimic museum exhibition lighting conditions.
- Notes
- Thesis (M.A.) -- Queen's University, 2015
- Langue
- English = Anglais
- Sujet
- Dyes and dyeing
- Dyes and dyeing - Textile fibers
- Textile fabrics - Conservation and restoration
- Textile fabrics - Preservation
- Teinture
- Teinture - Fibres textiles
- Textiles et tissus - Conservation et restauration
- Pays
- Canada
- Type de document
- Monograph = Monographie
- Localisation
- TS 1449 Z94 2015
- Clé
- 17614
- Collection
- Catalogue