Comparison method to differentiate between painted objects using polychromatic X-rays
X-radiography using the bremsstrahlung of a commercial broad spectrum X-ray source was used to quantify the differences and relationships between complex samples of unknown composition. The samples examined were painted and glazed ceramic mugs. The resulting pseudo-signatures were grey-level
transmission spectra which can be usefully compared over a range of acceleration potential settings from 40 to 95 kV, taken at 1 kV intervals. These data are extracted from stacks of registered field-flattened X-ray images. It is shown that it is possible to differentiate between transmission
spectra of the samples by concentrating mainly on the paint layers.
Keywords: Ceramics; X-ray absorption; X-ray imaging; grey level; non-destructive testing; paint pigments; provenance
Document Type: Research Article
Affiliations: 1 Institute for the Environment, Physical Sciences and Applied Mathematics, Keele University, Staffordshire ST5 5BG, UK.
Publication date: 01 March 2010
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and development papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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