Jag tror jag hittade orsaken
Citat:
Early cut sheet microforms and microfilms (to the 1930s) were printed on nitrate film, which poses high risks to their holding institutions, as nitrate film is chemically unstable and a fire hazard. From the late 1930s to the 1980s, microfilms were usually printed on a cellulose acetate base, which is prone to tears, vinegar syndrome, and redox blemishes. Vinegar syndrome is the result of chemical decay and produces "buckling and shrinking, embrittlement, and bubbling".[41] Redox blemishes are yellow, orange or red spots 15–150 micrometres in diameter created by oxidative attacks on the film, and are largely due to poor storage conditions.[42]
https://en.wikipedia.org/wiki/Microform
Det kanske inte är sabotage, det kan vara en kemisk reaktion. Hyllorna är daterade 1930-1932 syns i klippet på svts sida. Det är inkompetent arkivering som nog är problemet.
