uworischki
The following problem:
I need to produce reproductions of black-and-white images for large enlargements (70x100cm). For this, I use Efke R 50.
Normally, I develop the R 50 in F09 at a dilution of 1:40 for 10 minutes. This gives me good, well-defined negatives with normal contrast.
However, I need to achieve negatives with very high contrast.
If I conduct the film’s development for longer, I get a higher density, which I’d like to avoid; I just need higher contrast.
I’d appreciate any tips you might have!
Uwe
CPD
Hello,
Well, if you’ve already got the R09 – it can also be used as a contrast developer (and for developing photographic paper) at a dilution of 1:10. You’ll need to test the development time; as a starting point, I’d suggest using a quarter of the time required for the 1:40 dilution. Otherwise, standard paper developers will work too, perhaps diluted a little more.
I assume you’re using 35mm film. If you have the option of shooting on sheet film, I’d recommend orthochromatic material. It produces a nice steep curve and you can develop by eye under red darkroom light (caution: the red light gives the illusion of higher contrast than is actually present. Here’s a tip from old Beutler: take a good calendar print or a well-exposed and well-processed photo into the darkroom with you, then you’ll have a reference.)
Regards, CP
