Different films have different archival qualities- Ektachrome will "blue" at rates dependent on your storage conditions. Kodachrome is "near archival" in that depending on storage and usage conditions it can last for ~100 years. Black and white film stock is the most archival. Contact a professional with your needs and get their opinion. On Mon, 24 Jun 1996, Sally Baulch wrote: > On Mon, 24 Jun 1996, Vivian C.R. James wrote: > > > I am currently looking into having our collection photographed (4x5 > > transparencies) and I was wondering what are the rates that others have > > Warning. Transparencies have a lifespan of approximately 10 years before > they "blue." If you are going to the expense of shooting everything, > think about making a simultaneous set of slides (also not permanent) or > black and white negatives. Use quality processing or else you'll get the > "blues" and "reds" of the 60s neighborhood pharmacist masquerading as a > photo processor. > > Sally Baulch > Texas Memorial Museum >