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Strange marks on self-processed B&w prints

Sandra S , Mar 30, 2000; 01:27 p.m.

I use a Jobo Duolab for my B/W printing (and will later use it for my colour printing as well) and I use the slots for it. From time to time I get a print with spots and/or stripes on the print which I can not remove. The spots remember me of the spots on negative film due to left-over water but it is impossible in the slots, I assume. Has anybody an idea what this is and why it happens? It happens only occasionally but it is still annoying. If this is helpful: I use Ilford Multigrade IV paper, Ilford Multigrade developer, Ilfostop and Ilford Hypam. Any help on this is greatly appreciated.

Thanks Sandra


Roy Zartarian , Mar 30, 2000; 05:32 p.m.

For starters, get in touch with Jobo.

My experience has been that the support folks there respond promptly and thoroughly to email and telephone questions. And they'll probably want to know all the details of your processing procedure.

Chuck Ogden , Jun 14, 2000; 05:07 a.m.

I had a similar problem with Ilford Multigrade III in a slot processor at one time, but I don't think that the paper or the processing method had anything to do with it in my case. I believe that the spots/stains on my prints were the result of fixer residue on my hands recontaminating the print after it was washed. The problem went away after I starting being more careful about that.

Be careful about handling sponges, towels, or anything else that may have been contaminated with even the slightest bit of fixer residue. I've read that it's best to wash with soap and warm water after touching any fixer contaminated item. If you squeegee your prints, be sure to wash the counter top where you do this. It's probably a good idea to wash the squeegee also. If you use a sponge on a washed print, make sure it's one that has never been used for anything other than washed prints.

By the way, I've also noticed that a squeegee can leave marks if too much pressure is used. Actually, it doesn't take very much pressure to mark a glossy print if you have a stiff squeegee.

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