Lines of a fingerprint.

The Daily Post Weekly Photo Challenge is Lines.

The photo shows two overlapping fingerprints in sodium thiosulfate which has crystallized. The crystals were photographed through a microscope using polarized light.

Sodium thiosulfate is used as a photographic fixer in the darkroom as silver halide dissolves in it. Commonly known as Hypo in the days of the black and white darkroom.

A fingerprint in sodium thiosulfate.

14 thoughts on “Lines of a fingerprint.”

      1. At the time I was running the photo department at a scientific research establishment but these were taken in my spare time. I was interested in the technique as it wasn’t a process I used in the job.

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      2. Ah…OK..I thought it might be something like this. I remember back in school when all these amazing, otherworldly microscopic shots started coming out in different press sources. You were part of that wave?

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      3. Aaaand if you post about it, you will likely have to post a link somewhere in one of my comment sections because I do not get around to the blog as much as I’d like to and I am curious. I assume you are an engineer and jerry-rigged something.

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