Photographic style that uses only black and white no greyscale.

I used to do a technique in the darkroom on a special film that only reacted to the image projected on it as either black or white. No grey scale. I have since forgotten the name given to this technique. Does anyone know the name? See my example.Birds on a wire
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Lithography maybe?
Tom BeckCommented:
I don't know if there was a name for the technique or not but I used to do some B&W darkroom work back in the 70s and played around with a Kodak product called Kodalith film that gave the B&W results you describe.

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USGLOBALAuthor Commented:
Kodalith! That's the product I used back in the day! Thanks for the info!
Tom BeckCommented:
You're welcome. Brings back memories. I worked with sheets of Kodalith film then made contact prints from those on photographic paper. Thanks for the points.
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