Kodak gen5 film

[rai]

Greetings, anyone know the kodak gen5 film? Could it be used in cameras? Developing? Any information will be appreciated! Thank you!

 

[Paul Howell]

Here is the data sheet, have not heard that gen 5 can be used in general photography. Others may know.

https://www.heli.city/docs/techpubs/kodak/kodak_graphics/recording/ti2375.pdf

 

[AgX]

Yes and no... It is a light sensitive halide film. But intented for dot creation/reproduction in a print shop. Thus extremely hard. When looking at the characteristic curve, look at the scaling too!
You would have to try to reduce contrast by development.

 

[koraks]

Yeah, that characteristic curve looks pretty...vertical.
Also, have a look at spectral sensitivity. It's red sensitive and tapers off pretty fast towards green and blue. If I read correctly, about 5 stops less sensitivity for green compared to red and virtually insensitive to blue. A bit like running around with a deep orange filter on your lens all of the time. Interestingly pretty much the opposite from orthochromatic film.
No data for long exposure reciprocity (only for short exposures since it's intended to be exposed using lasers) and no data on anti-halation or anti-light piping measures (probably none).

I'd say it's a convincingly 'very special purpose' kind of film if you were to use it for regular photography. I bet it's a nightmare to get to work sort of decently for continuous tone applications.

 

[rai]

Thanks, thanks, thanks!!!

 

[Ian Grant]

Back in the 1970s I used a similar film in the darkroom

Resizing causes moire patters, but here's an enlarged portion.

I enlarged onto the film then made prints sometimes reversal negatives first. This is an Etch bleach print dyed yellow.

Ian

 

[JPD]

Does it make the dots directly, without needing a halftone screen?

 

[AgX]

You need a grid screen or rather a laser-printer.

 

[Ian Grant]

Does it make the dots directly, without needing a halftone screen?

Yes.

Ian

 

[rai]

Back in the 1970s I used a similar film in the darkroom

View attachment 255899

Resizing causes moire patters, but here's an enlarged portion.

View attachment 255900

I enlarged onto the film then made prints sometimes reversal negatives first. This is an Etch bleach print dyed yellow.

Ian[/QUote

Good and pretty, fine.

 

[JPD]

Yes.

Ian

Interesting. It's more of a speciality film than even the Agfa Copyproof paper.

You need a grid screen or rather a laser-printer.

I have used halftone screens, but I assume that they use printers instead today.

If anyone is interested, a halftone screen is basically a large negative with continous tone dots that you put on top of lith paper (or film), and then you make the exposure. The longer or brighter the exposure the larger the dots will grow. Perhaps this could be fun to experiment with in the darkroom, making prints that look like they come from a book or newspaper. This is what a halftone screen would look like under a microscope: