Preservation Basics: Timber and Metal by Andrew Pearce
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Transcript of Preservation Basics: Timber and Metal by Andrew Pearce
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Preservation Basics:Timber and Metal
Andrew Pearce: National Museum of Australia
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Deterioration of Timber
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Weathering of timber mast
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Delamination of plywood in late 1800’s pram
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Rot damage to Walter Burley-Griffin door
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Deterioration of Metals
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Wear damage to anchor chain
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Steel pylon bolted to aluminium surface of helicopter
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Star picket (iron in saline environment) and “bronze disease” on coins
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Fingerprint etching on silver
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Corrosion of lead by timber vapours
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Timber Preservation Basics
• Protect from moisture• Protect from light• Protect from biological attack• Protect from impact and
abrasion• Reduce the loads
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Metal Preservation Basics
• Protect from moisture• Keep salts away• Limit overpolishing• Be aware of bimetal corrosion and
reduce moisture if possible• Watch the vapors and pollution: air
transfer and tissue wrapping• Wear, impact, abrasion and vandalism• Don’t forget the non-metal bits!