4 ms·
Modern microfilm doesn't; what about the kind that's holding newspaper archives from the 1920s?
by woodruffw 4y ago
Modern microfilm doesn't; what about the kind that's holding newspaper archives from the 1920s?
- dredmorbius 4y agoIt seems that cellulose nitrate film stock was phased out by the 1950s: <https://www.nedcc.org/free-resources/preservation-leaflets/6.-reformatting/6.1-microfilm-and-microfiche https://www.nedcc.org/free-resources/preservation-leaflets/6...> How widely it was used prior to that time, and what filmstock selection practices specific institutions followed I don't know, though I suspect these may have varied. As for current polyester filmstock: Black-and-white polyester film has a life expectancy of 500+ years under proper storage conditions. (From the same source.)