MAINTAINING A SUITABLE ENVIRONMENT Photographic materials require a cool, dry, well-ventilated storage environment. High temperature and relative humidity increase deterioration and promote the growth of mould and mildew, which could mar surfaces and break down binder layers. Avoid storing photographs in the attic, the basement, or along the outside walls of a building, where environmental conditions are more prone to extremes and fluctuations and where condensation may occur. In some storage situations, seasonal adjustments such …showed first 75 words of 811 total…

…showed last 75 words of 811 total…photographic materials conservator before attempting to remove the adhered materials. Deteriorated negatives: Chemical instability is a major factor in the deterioration of early film-based materials. If film-based negatives are brittle, discoloured, sticky, or appear wavy and full of air bubbles, separate the negatives from the rest of the collection and consult a photographic materials conservator. A conservator will be able to help identify these materials and make recommendations for their safe storage and/or duplication.