Notice bibliographique du personnel « A comparison of ethanol and methanol vapour treatments for reshaping birch bark »
- Titre
- A comparison of ethanol and methanol vapour treatments for reshaping birch bark
- Auteur ou éditeur
- Dignard, Carole
- Poulin, Jennifer
- Tse, Season
- Kata, Sonia
- Lieu de publication
- Paris
- Collation
- 1-7
- Titre de la source
- ICOM Committee for Conservation, ICOM-CC, 18th Triennial Meeting, Copenhagen, Denmark, 4-8 September 2017
- Numéro de la source
- (2017)
- Résumé
- Methanol and ethanol vapours were compared for plasticizing warped birch bark in flattening treatments. Five sets of curved bark samples were tested using different solvent exposure times, flattening times, loads, and flattening mold shapes. Bark weights and curvatures were measured to monitor solvent absorption and success of flattening, including extent of rebound (‘plastic memory’). Both solvents were effective at reshaping, with vapour exposure time being an important factor. Successful treatments occurred after a week of exposure to methanol vapours corresponding to an average weight gain of 14.5%, and within three weeks of exposure to ethanol vapours corresponding to a 17.2% weight gain. Plastic memory always occurred after removing restraints. Longer flattening times improved flattening, but not heavier loads. Curved molds had benefits and disadvantages compared to flat boards. By adjusting treatment parameters, the safer solvent ethanol could be relatively as effective as methanol.
- Notes
- Paper 1202
- Langue
- English = Anglais
- Sujet
- Birch bark
- Ethanol
- Methanol
- Vapour
- Reshaping
- Plasticization
- Plastic memory
- ISBN/ISSN
- 9789290124269
- Pays
- France
- Localisation
- #16589
- Clé
- 2060
- Collection
- Staff Bibliography