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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Gamper, Charlotte; Thompson, Karen; Quye, Anita (2013)
Languages: English
Types: Other
Subjects:
Viscose rayon has been in production for over a century, however, minimal literature\ud is available on its conservation. Pre-1940s viscose rayon has poorer wet strength than later\ud versions. The fiber’s manufacture has influence on its wet strength and progressive\ud improvements to processing methods have improved this characteristic. The implications for\ud conservation wet cleaning treatments on examples from different eras were investigated. Tensile\ud strength testing was conducted on three sets of specimens from different times – c.1940s,\ud c.1960s and c.1980/90s – each subjected to a controlled wet cleaning treatment. Results showed\ud the two later viscose rayons lost significant strength in the wet state, up to 50%. The c.1940s\ud fabric had a greater strength reduction of around 80% - however, degradation from a black\ud colorant present affected the results. This highlighted the risk that degradation, even when not\ud visible macroscopically, can become significantly exacerbated in wetted viscose rayon. Further\ud tensile tests on specimens subjected to wet cleaning and then air dried showed a return of\ud strength upon drying, suggesting that no apparent immediate permanent impact was had on\ud fibers. This research has shown it can be suitable to wet clean viscose rayon, although such\ud treatment may be less appropriate for older more degraded versions.
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