Arrived my pH-meter and I can make some measurement.
Clearing time is relative to Agfa-304 clearing time. I claim: increasing amount of Ammonium Chloride from 50 to 85g/l in Agfa-304 make fixer in 2 times faster. This improvement not depended from pH or amount sulfite/metabisulfite. Usage Ammoniom Sulphate instead of Chloride give us more slow fixer (see case 6,7,8). I think that this is due to the fact that Sodium Sulphate working as anti-swelling agent and reduces the diffusion rate in the emulsion.
Last edited by Relayer; 07-01-2013 at 01:58 PM. Click to view previous post history.