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Useful tips on conserving 19th century photo-prints
Conservation Conditions:
- Relative Humidity: 30-40%
- Temperature: 18 ± 1ºC
- Air Filtration for Particles
- Air Purification to Remove Oxidant and Sulphurant gasses
- Lignin and Acid Free Cellulose Materials
- Use only Cellulose Triacetate, Polyester (Polyethylene Terephthalate) and Polyethylene Plastics - no PVC (Polyvinyl Chloride) or any Materials containing Chlorine or Sulphur
Photochemical damage to hand-coloured albumen prints
- Yellowing of the Albumen Protein
- Embrittling of the Cellulose
- Fading of Organic Pigments
- Degradation of Lignin producing Substances which Stain Prints and Attack Silver Images
- Acceleration of Chemical Reactions
Lighting conditions for display of 19th century prints
- Always use lights with UV Filter
- Protect against Sunlight
- Light Level: 50 Lux (5 foot-candles)
- Exhibition time not to exceed 250 hours
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