Film softened, scraped, and then dried. Unwanted images removed from microfilm for softening base film with hot water, scraping film and drying with isopropyl alcohol. Method simple and no visible damage to film.
Removing Images From Microfilm
NASA Tech Briefs ; 8 , 1
1984-04-01
Miscellaneous
No indication
English
SAE Technical Papers | 1971
|Apparatus for Inspecting Microfilm
NTIS | 1969
|Engineering Index Backfile | 1968
|Prototype microfilm storage and display Final report
NTRS | 1969
|Aircraft technical records stored on microfilm – new solution
Emerald Group Publishing | 2006