jim appleyard
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- Nov 21, 2004
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Hey Ole, are you still around? Looking to mix up your Quick Fix and wondering about times for both RC and FB papers.
Jim are you talking about a mix from scratch fix.. I would be interested in that as well..from my experience (years ago) I did not find much difference in $$$ mixing my own and using Ilford Rapid fix from the bottle.Ok, found that and sent. We'll see what he says and will share the info.
Jim are you talking about a mix from scratch fix.. I would be interested in that as well..from my experience (years ago) I did not find much difference in $$$ mixing my own and using Ilford Rapid fix from the bottle.
I reformulated this fixer to neutral pH,
I got two 25kg sacks of Sodium Thiosulfate and one 25 kg of Ammonium Chloride for about 100€. These 50 kg Sodium Thiosulfate make 250 liters of fixer. Compared to that, 20 liters of rapid fixer concentrate cost about the same, but make only 100 liters of fixer. The price difference is not dramatic, but it's there.For my needs it needs to be much cheaper than buying the Hypam or Rapid Fix in the 5 litre containers to make it worth doing from scratch.... developers , hypo clear are way cheaper... but I never found a fix that is cheaper.
My times for RC&PE papers are "leave it in there until I get bored or need space in the fixer tray". I did measure clearing speed of my rapid fixer with Fuji Neopan Acros 100 and with Kodak Tri-X, and its clearing time is marginally slower than rapid fixer.Rudeofus, what are your times for RC & FB papers?
Your formula is it a rapid fix... this is a significant saving something I should consider.I got two 25kg sacks of Sodium Thiosulfate and one 25 kg of Ammonium Chloride for about 100€. These 50 kg Sodium Thiosulfate make 250 liters of fixer. Compared to that, 20 liters of rapid fixer concentrate cost about the same, but make only 100 liters of fixer. The price difference is not dramatic, but it's there.
While it has roughly the same fixing speed as commercial rapid fixers, it contains about one mol of sodium ion per liter, which brings about the issues I detailed in posting #16 here.Your formula is it a rapid fix... this is a significant saving something I should consider.
Once I mixed up Agfa 304 fixer, containing sodium thiosulfate and ammonium chloride, and found that it did indeed have low capacity as it formed a cloudy solution not suited to reuse several times, which is how I use proprietary fixer.My times for RC&PE papers are "leave it in there until I get bored or need space in the fixer tray". I did measure clearing speed of my rapid fixer with Fuji Neopan Acros 100 and with Kodak Tri-X, and its clearing time is marginally slower than rapid fixer.
Since the fixer is neutral, it doesn't bleach silver, and my prints always get at least 30 minutes of wash time at 25° or higher.
Before anyone dives into these Sodium Thiosulfate plus Ammonium Chloride fixers: be aware, that Sodium, Thiosulfate, Silver and halides can form highly insoluble mixed salts as the silver halide concentration goes up. Even if a Sodium Thiosulfate plus Ammonium Chloride fixer offers comparable clearing speeds, it will have lower capacity than rapid fixers. These Sodium Thiosulfate plus Ammonium Chloride fixers are aimed at frugal photo amateurs with low throughput, not at high volume pro labs!
there isn't much difference in cost;might as well buy the Ilford fixer.Jim are you talking about a mix from scratch fix.. I would be interested in that as well..from my experience (years ago) I did not find much difference in $$$ mixing my own and using Ilford Rapid fix from the bottle.
Thanks Ralph that is what I found years ago ... and a lot of work to boot.there isn't much difference in cost;might as well buy the Ilford fixer.
Agfa 304 is very acidic, so it will not last. That cloudy precipitate was likely Sulfur, not the mixed salt I wrote about.Once I mixed up Agfa 304 fixer, containing sodium thiosulfate and ammonium chloride, and found that it did indeed have low capacity as it formed a cloudy solution not suited to reuse several times, which is how I use proprietary fixer.
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