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#11
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4 x 5 Tri-X tray development
"Matt Ashbrook" wrote in
news:6q0Hc.40364$MB3.39183@attbi_s04: When tray developing Tri-X, what size tray, what quantity of developer, and how many sheets at one time is recommended. I'll be using HC-110 dil B or D-76. Thanks, Matt A. Matt: I use trays for 4x5 - and find that 6 is about the largest number of sheets that I want to do at a time. I've done more, but I'm more comfortable with six or fewer. Its generally recommended that you use trays that are larger than the film sixe. I use 5x7 trays for my entire processing sequence. I've tried 4x5 trays - that's OK for a single sheet, but it's too hard to life a sheet out for agitation if you are doing multiple sheets in small trays. I've also used 8x10 trays - but I prefer 5x7 since the sheets don't "wander around" in the tray and instead remain in a fairly neat stack. My darkroom was calibrated for 35mm using a Durst tank. So I have a graduate that I've marked for the amount of HC110 concentrate (the stock concentrate, not the syrup)for one or two rolls of 35mm in dilution B. If I'm doing only one or two sheets, I will mix up a "one roll" batch of HC110. Otherwise, I mix up a "two roll" batch. Not scientific, but it works for me. Obviously, I use the developer as a one-shot. I always presoak my film, and I believe that is a critical stap. I remove the film from the holders and place it in a spare box for holding while I mix the chemicals. Then, with the lights off, I transfer sheets, one at a time, into the presoak bath and agitate for 15 - 20 seconds. It is critical to get each sheet thoroughly wetted before adding another sheet to the stack. If this is not done properly, the sheets will stick together (ruining the film). Incidentally, the risk of ruined film is another reason to limit the number of sheets processed at a time - its call risk management! I process face down. This is a controversial point - but my experience is that the greatest risk of scratching film comes when you add a sheet to the stack - the leading edge of the film will scratch the sheet below it if the emulsion is face up. But if the emulsion is face down (asuming that the bottom of the tray does not have any burrs that can scratch), then the risk of scratching is minimal (but not non-existent). Final point - I always wear latex or vinyl gloves when tray processing. I've never had an allergy problem, but there's no reason to take unnecessary chances. Furthermore, gloves minimize the risk of damaging film (fingernails are sharp!). |
#12
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4 x 5 Tri-X tray development
"Matt Ashbrook" wrote in
news:6q0Hc.40364$MB3.39183@attbi_s04: When tray developing Tri-X, what size tray, what quantity of developer, and how many sheets at one time is recommended. I'll be using HC-110 dil B or D-76. Thanks, Matt A. Matt: I use trays for 4x5 - and find that 6 is about the largest number of sheets that I want to do at a time. I've done more, but I'm more comfortable with six or fewer. Its generally recommended that you use trays that are larger than the film sixe. I use 5x7 trays for my entire processing sequence. I've tried 4x5 trays - that's OK for a single sheet, but it's too hard to life a sheet out for agitation if you are doing multiple sheets in small trays. I've also used 8x10 trays - but I prefer 5x7 since the sheets don't "wander around" in the tray and instead remain in a fairly neat stack. My darkroom was calibrated for 35mm using a Durst tank. So I have a graduate that I've marked for the amount of HC110 concentrate (the stock concentrate, not the syrup)for one or two rolls of 35mm in dilution B. If I'm doing only one or two sheets, I will mix up a "one roll" batch of HC110. Otherwise, I mix up a "two roll" batch. Not scientific, but it works for me. Obviously, I use the developer as a one-shot. I always presoak my film, and I believe that is a critical stap. I remove the film from the holders and place it in a spare box for holding while I mix the chemicals. Then, with the lights off, I transfer sheets, one at a time, into the presoak bath and agitate for 15 - 20 seconds. It is critical to get each sheet thoroughly wetted before adding another sheet to the stack. If this is not done properly, the sheets will stick together (ruining the film). Incidentally, the risk of ruined film is another reason to limit the number of sheets processed at a time - its call risk management! I process face down. This is a controversial point - but my experience is that the greatest risk of scratching film comes when you add a sheet to the stack - the leading edge of the film will scratch the sheet below it if the emulsion is face up. But if the emulsion is face down (asuming that the bottom of the tray does not have any burrs that can scratch), then the risk of scratching is minimal (but not non-existent). Final point - I always wear latex or vinyl gloves when tray processing. I've never had an allergy problem, but there's no reason to take unnecessary chances. Furthermore, gloves minimize the risk of damaging film (fingernails are sharp!). |
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