For your best photos, make archival prints, platinum or selenium-toned for black and white, or large-format silver-based color-separation negatives. Certain silver and digital color print processes, such as recent Kodacolor, Cibachrome, and pigment inkjet, can last for hundreds of years if stored in the dark. It is important that the papers must not incorporate “brighteners” that re-radiate ultraviolet rays.
The bottom line is, if you really care about the long-term, store multiple copies of everything with full interfaces in different locations. Fire, water, earthquakes, and tornados are more destructive than bad plugs and media microfractures. And you can’t plan on copying content over and over again forever, which is why you want to archive it right the first time on media that will last as long as possible.
For more information on long-term storage, go online to:www.wilhelm-research.com/www.itl.nist.govwww.dlib.org