bendytwin
Allowing Ads
For the benefit of all, I want to conduct a side-by-side controlled comparison of anti-fog agents on extravagantly expired black-and-white film.
My motivation and context: I love hand-developing very expired black-and-white stock with my students. It provides an opportunity to engage with multiple aspects of hand processing, and is recuperative of materials that would otherwise go unused. I'm quite familiar with using KBr and benzotriazole on both expired paper and film. When manageable, I am using 50yr+ expired 16mm as camera stock, often rated down to single-digit ISO, pull-processed with anti-fog. But for stock that is too fogged for this purpose, I'm using it as PRINT stock in a contact printer, with a program to expose per-frame as long as needed to counteract the anti-fog speed loss. This opens up a lot of possibilities.
Here is a list of anti-fog agents I want to compare side-by-side and together in different combinations, keeping developer and film the same:
1. Potassium bromide
2. Benzotriazole
3. Kodak Anti-Foggant AF-2000 (used in ECN-2 at 5mL/L)
4. Kodak Anti-Fog #2 6-Nitrobenzimidazole Nitrate CAS 27896-84-0
5. Kodak Anti-Fog #5 5-Methylbenzotriazole CAS 136-85-6
6. Kodak Anti-Fog #6 3-Methylbenzothiazolium p-Toluenesulfonate CAS 6112-39-6
7. Kodak Anti-Fog #9 3,5-Dinitrobenzoic Acid CAS 99-34-3
8. "Phenyl Mercapto Tetrazole" or PMT, purchasable as Bellini Anti-Fog (1-Phenyl-5-mercaptotetrazole)
Of that list, I've got plenty of KBr, BTAZ, and AF-2000, and I can get the PMT from Freestyle as Bellini Anti-Fog. But I am lacking the rest and have never seen them readily available. Would anyone have a small amount of Kodak Anti-Fog #s 2/5/6/9 they can send me to experiment? Please feel free to message me or reply to this thread. If this list is incomplete from obtainable anti-fog agents I'd also like to know.
Several questions, some expansive and some specific, as I plan out the comparison
1) Anyone have experience using AF-2000 with black-and-white developers? What's its effectiveness?
2) Are the above anti-fog agents are "synergistic" with each other? (from experience it feels like KBr and BTAZ together are more effective than just higher doses of either alone)
3) How do different anti-fog agents interact differently with different developing agents? For my purposes, I am most interested in using it with D19 (metol/hydroquinone) for reversal, and in Xtol for processing as black-and-white negative.
Picture of a big stack of recently acquired 2498 Kodak RAR stock expired June 1981, and some 2475 Kodak Recording Film expired December 1979... from the near-opaque fog level it's apparently been baking in some forlorn military warehouse for most of the time since then.
My motivation and context: I love hand-developing very expired black-and-white stock with my students. It provides an opportunity to engage with multiple aspects of hand processing, and is recuperative of materials that would otherwise go unused. I'm quite familiar with using KBr and benzotriazole on both expired paper and film. When manageable, I am using 50yr+ expired 16mm as camera stock, often rated down to single-digit ISO, pull-processed with anti-fog. But for stock that is too fogged for this purpose, I'm using it as PRINT stock in a contact printer, with a program to expose per-frame as long as needed to counteract the anti-fog speed loss. This opens up a lot of possibilities.
Here is a list of anti-fog agents I want to compare side-by-side and together in different combinations, keeping developer and film the same:
1. Potassium bromide
2. Benzotriazole
3. Kodak Anti-Foggant AF-2000 (used in ECN-2 at 5mL/L)
4. Kodak Anti-Fog #2 6-Nitrobenzimidazole Nitrate CAS 27896-84-0
5. Kodak Anti-Fog #5 5-Methylbenzotriazole CAS 136-85-6
6. Kodak Anti-Fog #6 3-Methylbenzothiazolium p-Toluenesulfonate CAS 6112-39-6
7. Kodak Anti-Fog #9 3,5-Dinitrobenzoic Acid CAS 99-34-3
8. "Phenyl Mercapto Tetrazole" or PMT, purchasable as Bellini Anti-Fog (1-Phenyl-5-mercaptotetrazole)
Of that list, I've got plenty of KBr, BTAZ, and AF-2000, and I can get the PMT from Freestyle as Bellini Anti-Fog. But I am lacking the rest and have never seen them readily available. Would anyone have a small amount of Kodak Anti-Fog #s 2/5/6/9 they can send me to experiment? Please feel free to message me or reply to this thread. If this list is incomplete from obtainable anti-fog agents I'd also like to know.
Several questions, some expansive and some specific, as I plan out the comparison
1) Anyone have experience using AF-2000 with black-and-white developers? What's its effectiveness?
2) Are the above anti-fog agents are "synergistic" with each other? (from experience it feels like KBr and BTAZ together are more effective than just higher doses of either alone)
3) How do different anti-fog agents interact differently with different developing agents? For my purposes, I am most interested in using it with D19 (metol/hydroquinone) for reversal, and in Xtol for processing as black-and-white negative.
Picture of a big stack of recently acquired 2498 Kodak RAR stock expired June 1981, and some 2475 Kodak Recording Film expired December 1979... from the near-opaque fog level it's apparently been baking in some forlorn military warehouse for most of the time since then.