I have tested Sistan type materials as a function of wash and have found that the Sistan chemistry effect goes up as wash quality goes down. So far my tests are nearly 10 years old. With the right combination of chemistry and time, I can fully wash an RC print in 15".
PE
I never said anything like that.
Current wash directions differ between Kodak and Ilford and also between FB and RC papers. Follow the ones that suit you best.
I have mixed custom chemistry which allows RC wash times to be reduced to 15" in running water and the prints are still good after nearly 10 years. That is CUSTOM chemistry which is normally available. It cannot be done with existing off the shelf chemistry.
PE
Can you elaborate. Running water for 2' should suffice. Fix strength (1+9 vs 1+4) and time don't matter with RC?
I feel your pain and I'm sorry for your loss;Fortunately this never happened to any of my Sistan-treated RC prints.I'm not awRE of silver stab to be a danger to RC prints but I am aware thatbsistan residue left on the print can cause issues.Did you wipe these prints off well?I'd had problems with a couple of Foma RC prints (there was a url link here which no longer exists) when framed, and Sistan was recommended as a good preventative measure. So I bought a bottle, made up a batch and processed basically my whole back-archives of B&W RC prints, including from other paper vendors.
Well, that was a Really Stupid thing to do, because it has destroyed over half of my prints with serious bleaching in disgusting dribbly patterns that formed over about 8 weeks in dark storage. I'm talking about the loss of hundreds of dollars of paper and hundreds of hours of darkroom work here - prints that were in perfect condition are now good only for the bin - and I am extremely angry about it. I'll post some scans tomorrow, but believe me, the damage varies from "a spot" to "catastrophic"; it seems to be increasing and I suspect that I am going to lose all of my RC B&W prints. About 6 years worth!
Consider yourself warned in the most dire fashion possible.
Well said. I hope we get responsesInteresting post. Really sad for the op!
we are 7 years later... anyone else has had sistan treated prints go bad?
Yes unless almost no-one else uses those chemicals on Photrio, I would have expected others to mention the same problem as he did and I cannot recall any such threadGlancing through this thread I still think Polyglot did not apply Sistan correctly.
Imagine the amount of that compound diffused into the emulsion per area unit, and then think of a droplet deposited on this areas, drying out. The mass of compound in and on the emulsion now will be greater by magnitudes.
Ifeel for you. Luckely I didn't have the same experience. These problems have been reported with prints where someSistan residue was left on the print. The proper procedure apparently is:I'd had problems with a couple of Foma RC prints (there was a url link here which no longer exists) when framed, and Sistan was recommended as a good preventative measure. So I bought a bottle, made up a batch and processed basically my whole back-archives of B&W RC prints, including from other paper vendors.
Well, that was a Really Stupid thing to do, because it has destroyed over half of my prints with serious bleaching in disgusting dribbly patterns that formed over about 8 weeks in dark storage. I'm talking about the loss of hundreds of dollars of paper and hundreds of hours of darkroom work here - prints that were in perfect condition are now good only for the bin - and I am extremely angry about it. I'll post some scans tomorrow, but believe me, the damage varies from "a spot" to "catastrophic"; it seems to be increasing and I suspect that I am going to lose all of my RC B&W prints. About 6 years worth!
Consider yourself warned in the most dire fashion possible.
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