Digital negatives for silver gelatin prints

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hiroh

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I'm sure this will be a dumb question for some of you experienced analog printers, but please bear with me. I've never printed any silve gelatin in my life, so this is my first attempt.

I've recently attended platinum palladium workshop and I did some prints on my own afterwards. They look good, because I learned how to calibrate curves properly and print correct digital negatives. Few day ago, I thought, can I use these negatives for silver gelatin prints, since I already have them. I purchased Ilford multigrade developer, stop bath and fixer and I gave it a try today. The results were terrible. First, I have to note that I don't have the enlarger. I have UV exposure unit and contact frame, that both works great for palladium. I used the same unit for silver gelatin, but I couldn't get nearly the right exposure. Even if I turn the lights for a second, the paper will go eventually completely black into developer. I made a test strips, and in order to see the image, I have to keep it only few seconds into developer, but then, the blacks are very faint. If I keep it a second or two longer, everything will go completely dark. Then, just out of curiosity, I tried it under the room lights, and I kept the lights on for 30 seconds in order to see the image, but then again, the blacks are not black, and if I keep it any longer into developer, everything will go too dark.

I'm watching videos about darkroom printing, and people keep the paper in the developer for minutes before the image appears. In my case it takes seconds and then it gets too dark immediately as soon as I get the paper out of the tray. Is this a problem with the negative, or I must use some special lights for silver gelatin prints? Do I really need the enlarger?

I used 9:1 ratio for the Ilford Multigrade developer and Ilford Multigrade FB warmtone paper.
 
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radiant

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You probably have three problems:
- too much light; silver gelatin is so much faster paper than alternative processes. You need only very small fraction.
- UV-light causes the multigrade paper to print on the highest contrast as it is "blue". You don't want that.
- trying to control tonality by developing time

Solution: do not use UV exposure unit, use a dim normal light bulb hanging from a good distance. Find a bulb that has the lowest output wattage to enhance the timing accuracy. Keep your paper in developer for minute and don't try the "snatch" technique; it makes things difficult. If your paper develops to complete black, then you just have too much exposure.

Good luck!

ps. check your safelights too; leave the paper out in the safelights for few minutes and then develop; you want to get fully white paper. If you don't get, then your safelights have problem / light leakage problem.
 
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hiroh

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Thanks @radiant

This is quite helpful, I'll try a lightbulb instead UV. Does it matter if it's LED or incandescent? Also, when you say "trying to control tonality by developing time", does it mean that if I get the exposure right, I can leave it into developer as much as I want, and it shouldn't change any further?
 

radiant

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Thanks @radiant

This is quite helpful, I'll try a lightbulb instead UV. Does it matter if it's LED or incandescent? Also, when you say "trying to control tonality by developing time", does it mean that if I get the exposure right, I can leave it into developer as much as I want, and it shouldn't change any further?

If you buy a new one, then consider a LED bulb with color control. That way you can control contrast. You probably control your contrast in creating of digital negative so it isn't that important. But maybe you could fine tune the process. And for fun :smile: Blue = high contrast, green = low contrast print. Incandescent is probably most optimal as it has good spectrum, halogen I guess is a tad better? There are many here who know this well. But in common sense any bulb will do, there are some differences what kind of contrast you get out of the print. But that you can adjust in making the digital negative.

Silver gelatin papers are developed "fully" and usually means some minutes in developer. Typically one minute and then you reach a point when the picture itself doesn't change. That is your target.
 
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hiroh

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That helps greatly. I'll try with the bulbs I have at home and see how it works.
 

Alan9940

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You might find that an optimal negative for silver gelatin isn't the same as for Pt/Pd printing; though, if you can effectively control contrast with the multigrade paper you might be just fine with your original negatives. I would suggest printing a new negative with a step wedge on the side to see exactly what your tones are doing. You can adjust from there. FWIW, I've printed Pt/Pd for 20 years via digital negs and have been pleased with the results; not so much with silver printing. Print tonality was fine, but the dot pattern of the ink was too obtrusive for my taste. Good luck and please report back with your findings.
 

radiant

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Must ... resist .. on .. buying ... inkjet ... printer ....

:smile:
 

Fraunhofer

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Resistance is futile. Some ink jet printers are practically free if you get the right deal, ink is not of course :smile:
 

radiant

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Resistance is futile. Some ink jet printers are practically free if you get the right deal, ink is not of course :smile:

For me it opens too many boxes. And the problem "which should I get" is real. Then I will start spending my time on computer .. oh, wait!
 

Fraunhofer

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understood, we got a printer to print family photos from phones and of course, I had to play with digital negatives. But I agree, the question is how much time do you want in front of a computer versus playing in the darkroom.
 
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