Use this URL to cite or link to this record in EThOS:
Title: Raman spectroscopy and the conservation of historic painted textiles
Author: Macdonald, Averil Mary
ISNI:       0000 0001 3614 9278
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2004
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Please try the link below.
Access from Institution:
The appropriate protocol is developed through which Raman spectroscopy can identify the pigments used on historic painted textiles whether in oil or water based paints. It is shown that: samples should ideally be exposed to no more than 5mW power for 10 scans of 10 seconds to reduce the possibility of thermal damage, while an increase to 30 scans will reduce the signal-to-noise ratio if a higher quality spectrum is required for unambiguous pigment identification; a smooth sample surface provides higher spectrum quality; small particle size does not adversely affect the spectrum intensity and fluorescence suppression is best achieved through use of a confocal pinhole set up as photobleaching resulted in possible damage to the artefact. Raman spectroscopy is also shown to distinguish between the various synthetic polymeric adhesives used during textile conservation to heat-seal crepeline netting to silk, however when applied in situ to a model textile-polymer laminate system confocal Raman spectroscopy is unable to exclude the spectrum of the underlying silk substrate. Depth profiling the laminate demonstrates that focusing just above the polymer surface reduces the relative contribution from the silk, however contrary to confocal theory, lowering the sample ~20 microns below the point of focus results in the relative contribution from the underlying silk increasing to a level comparable with that obtained when focused within the polymer ~3 microns above the silk.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available