Copex Rapid in D-76?

[ricardo12458]

Looking for some tips on developing (Agfa) Copex Rapid in plain old D-76 (either stock or 1:1), this is a stock I picked for its technical use (as a doc storage film), so a low-contrast developer for pictorial use does not apply here. This seems to be a little-used combination, since pretty much anyone else using this film ends up developing for low contrast.

Thanks
R

 

[Alan Johnson]

I believe specialized developers are often used for best results:
https://www.photrio.com/forum/threads/want-a-very-high-contrast-developer-for-litho-film.158794/

 

[cmacd123]

for document use their were special developers to bump up the contrast. you are a bit on your own, so try to tests at various devleopment times to see what you need.

 

[halfaman]

Maco had Rollei RHC developer for this kind of films. If you find something it could do the trick.

190910_RHC_Datenblatt_EN.indd (rolleianalog.com)

 

[Craig75]

For doc storage im assuming just two tone black and white ou want it has high contrast as possible so i would just hammer it for 15 mins in 1+1 and see where you are. Id be surprised if that didnt give you very high contrast crisp archival stirage shots.

I did it the other way and tried to work down to pictorial contrast but best i could do with standard developers was about 4 stops so it should be simple to get high contrast negs with a regular developer

 

[ricardo12458]

went with 8 mins in D-76 stock, still managed to extract a small amount of grey tones. Pretty happy with the results overall though my lighting was a bit off: