Svema Direct Positive Film

[railwayman3]

I'm intrigued how this film works...anyone any ideas ? And how could it be used for "finger prints" ?

https://filmphotographystore.com/pr...d65&_ss=r&mc_cid=aee4d5cebf&mc_eid=4b16b219d4

 

[AgX]

I very much assume the Film Photography Project mixed things up.

I never heard of photographic film being used in dactyloscopy other than taking photographic evidence.

One could imagine using wetted photographic film by lack of adhesive tape as makeshift solution..... But already the stiffness of photographic film will form an obstacle.

Taking the fingerprints directly on film and then using the barrier effect of the finger-grease in development for imaging, makes not much sense either seen the classic technologies.


The classic use of direct positive films was in micrography and as copy films.
My best bet to make a connection to dactyloscopy is, this film was used for fingerprint micrography.
But likely just photographic and adhesive films were mixd up.

To yield a direct positive working film different technics may be employed.

 

[railwayman3]

Google produces a bit more information:-
http://www.alexluyckx.com/blog/index.php/2015/01/07/svema-madness/

The film seems to be Svema Micrat Orto film......but the blog then goes on to say that it's Kodak 2468 supplied to Svema. Quite a lot of Google references to this Kodak film , e.g http://craneimaging.com/images/PDF/D-32.pdf
Looks as though it is, or was, for duplicating microfilms ?

Astrum (the present Ukrainian manufacturer) has a page relating to " Dactylographic films",
http://www.astrum-ltd.com/en/daktiloskopiya.html
but I still don't see the connection.....perhaps there is some misunderstanding in the FPP description.

 

[AgX]

As I said, a typical use for direct positive films is as copy films, mostly in micrography.

The Astrum film is a adhesive film to take up the black powder after it being dusted over an alleged finger print. You see that in most crine movies.

 

[railwayman3]

Thanks for that info. The Svema film seems to be an interesting product,

 

[AgX]

The film seems to be Svema Micrat Orto film.....
Looks as though it is, or was, for duplicating microfilms ?

-) Svema has long ago gone under.
-) Mikrat Ortho was a plain, negative-acting microfilm.