zarrir_junior Posted November 21, 2009 Share Posted November 21, 2009 <p>I have got some powdered ammonium thiosulfate to produce TF-3. At which temperature should i dilute 600 grams of it into 1000 ml of water to produce a 60% solution? Can i use Sodium carbonate instead of Sodium metaborate (after doing the proper weight conversion)? I understand the dilution for film fixing is 1:4 water. Is that valid for papers too?</p> Link to comment Share on other sites More sharing options...
jordan_w. Posted November 21, 2009 Share Posted November 21, 2009 <p>I can't comment on the other issues, but I would be very careful substituting a carbonate in for the metaborate. </p> Link to comment Share on other sites More sharing options...
david_zheng1 Posted November 22, 2009 Share Posted November 22, 2009 <p>Room temprature is OK and then you need to heat to 50 - 60 degree celsuis. Dissolving process will obsorb heat so it is pretty safe. Sodium carbonate should be more basic than Sodium metaborate, so it will change PH value that may effect result of fixing.</p> Link to comment Share on other sites More sharing options...
zarrir_junior Posted November 23, 2009 Author Share Posted November 23, 2009 <p>In The Darkroom Cookbook first edition, Anchell makes a correlation between Carbonate and Metaborate in terms of mass required for the same buffering activity. I do not remember the figures. Because i only have carbonate here, i would like to know if anybody has ever used it in place of Metaborate for this formula.</p> Link to comment Share on other sites More sharing options...
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