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Kodak Sonochrome...seems to be all but forgotten


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Why should it come off? The base is tinted in the mass. Read https://filmcolors.org/timeline-entry/1330/

 

Description

Kodak Sonochrome was a specially prepared tinted film for sound film that did not interfere with the spectral sensitivity of the photo-electric cell for the reading of the optical sound track.

The 17 Sonochrome tints were dyed in mainly light hues for maximum light transmission, with the exception of purple, blue and green that had transmissions below 40%. The hues were given poetic names to express color-mood associations.

Eastman Kodak, Agfa, Pathé and others produced pre-tinted film base before the advent of sound.

Pre-tinted stock can be identified by scratching the emulsion off in a small area outside the frame revealing the colored film base.

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Dunno? But dye is not always stable Simon. I used film cleaner and it removed some of the dye on the 16mm. And don't know if it was Sonochrome. I will see if I can scratch them to test.

You can see here that Kodak dye transfer dyes were water soluble...at least the ones used for making paper prints. My tests show Kodak dyes start running with as little as 30 minutes of soaking prints in water.

nsfw

https://danieldteolijrarchivalcollection.wordpress.com/2018/10/03/inkjet-water-damage-tests/

 

 

 

 

 

 

Edited by Daniel D. Teoli Jr.
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