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Consolidation of black-dyed Maori textile artefacts: Evaluating the efficacy of sodium alginate

Smith, Catherine A., Paterson, Rachel A., Lowe, Bronwyn J. and Te Kanawa, Rangi 2016. Consolidation of black-dyed Maori textile artefacts: Evaluating the efficacy of sodium alginate. Studies in Conservation 63 (3) , p. 139. 10.1080/00393630.2016.1266150

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Abstract

Black-dyed artefacts are found in museums worldwide, many produced using an iron-tannate compound. Deterioration of iron-tannate dyed artefacts is an international preservation issue: in New Zealand the deterioration of paru (iron-tannate) dyed Māori textiles is widespread. This article reports experimental work testing the efficacy of sodium alginate, a consolidant developed for deteriorated paru-dyed muka (fibre from harakeke; Phormium tenax). The colour stability, strength retention, and acidity of paru-dyed muka consolidated with sodium alginate (0.25, 0.5, and 1% w/v in water) was tested pre- and post-artificial light ageing. This study found that sodium alginate had no negative effect on paru-dyed muka and in some cases provided benefit. Interestingly, the colour of paru-dyed muka is substantially more stable in UV-filtered light than previously recognised. Also microfading results were in agreement with visual assessments of colour change at 1 Mlux hour exposure, providing confidence in this relatively new technique to assess colour change.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Biosciences
Publisher: Maney Publishing
ISSN: 0039-3630
Date of First Compliant Deposit: 22 November 2018
Date of Acceptance: 25 November 2016
Last Modified: 23 Nov 2018 11:17
URI: http://orca.cf.ac.uk/id/eprint/117022

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