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What is Duplex Roll Film Scanning?

Duplex roll film is 16mm microfilm that has been created with two images per frame. The front and backside of a document page was filmed at the same time as the front or they are simply two separate images side-by-side. There are around 5,000 frames on a 100-foot roll of 16mm duplex film, however once the pages get split it would be 10,000 separate images if split. Of course these are just estimates and longer film could contain a whopping 15,000+ frames (30,000+ images). Some documents were small to begin with, such as envelopes, checks, birth, death, and marriage certificates, driver’s licenses, fingerprints, and traffic tickets. In such cases rolls may contain┬ádouble the expected amount (30,000-60,000 images)!

duplex microfilm

There are a handful of ways to scan duplex microfilm. Depending on how it was filmed, Generation Imaging can save both frames in one image, or save out two images separately. Advanced options include deleting out black backsides and making multi-page pdfs or tiffs based on blips or indexing fields.

Generation Imaging has a price discount for digitizing duplex rolls. This is because there are so many images on a roll, in some cases one roll has the same number of images of 2-4 common rolls. Keep in mind, the turnaround time for converting duplex microfilm will indeed be longer than standard 16mm rolls.

The bottom line is regardless of how duplex rolls were filmed, Generation Imaging will scan them so you won’t even know that a different technique was used; the end result is the same as other reels.

Feel free to contact us with any questions about your film.

 

 

 

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