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.
David M's PhotoBlog 
14 replies on “Lines of a Fingerprint”
Very cool image.
Thanks Graham.
Really awesome way of treating finger prints. I love the electrifying neon colors – psychedelic colors👍😃
Thanks
[…] Lines of a fingerprint. – David M’s photo blog. […]
[…] Lines of a fingerprint by David M’s photo blog All lined up and everywhere to go – Fotoeins Fotografie WPC: Lines… by Stanley and Bear In the Zen Garden by Travel Words Weekly photo challenge: Lines by Streets of Nuremberg […]
Beautiful…is there a quick explanation of your set up for shooting this?
Maybe I should write a future post about polarized light microscopy.
I’m curious. Was this part of your job? Where you researching something or reporting on it or just curious?
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.
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?
I may have been, these were taken in the early 1980s.
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.
I finally got around to finishing it,
https://davidmsphotoblog.com/2018/05/12/polarized-light-photomicroscopy/