Because of the rapid deterioration of nitrate film, it should take priority when selecting items to be digitized. Once the film begins to change to an amber color, the image will fade. Rather than attempting to stop the process of the deterioration of nitrate film, digitization and separation from the collection are key. Once deterioration has started, it is irreversible. The only way to slow the process is through proper storage.
Likewise, the deterioration of acetate safety film is inevitable, and once it starts, it cannot be stopped. Through adequate storage, the process of deterioration is slowed. However, digitization of the images or transferring the images to polyester safety supports can prolong the life of the image more than storage.
The preservation of glass negatives is challenging because of the varying chemicals and types of glass that were used. Photographers during this period used their own “recipes” to create glass negatives, therefore it is almost impossible to create a one-size-fits-all approach to preservation. Heat, pollution, water damage, mold, and low or high humidity impact the deterioration of glass negatives.
archiving negatives 