Question about the use of photostatic image copies of original documents

Dear Editor;

A bit of an odd and possibly trivial question...

My father, working in the military photo trade, often preserved copies of precious documents by making photostat copies of the originals. Unfortunately; photostats are white on black image copies, rather than the currently accepted black on white image copies. The original artifact from which I made my transcription is the white on black photostat. So, I've been citing it as a "photostatic image copy" and even storing an unreversed scanned image of the same. Is this the correct approach? I'm not sure whether the format would actually impact the validity of the evidence.

Submitted byEEon Fri, 03/08/2019 - 10:11

History-Hunter, your approach is sound. With photographic images of any type, validity of the evidence would normally come into play in two ways: 1) if legibility was a problem; or 2) if someone had some reason to suspect a manipulation that altered details.  

Given that photostatic images are now "ancient" technology and that many young researchers might not understand your reference, you might describe them as "photostatic (negative) images." That would address the legibility issue that often accompanies the use of white-on-black documents.