Hi, thanks, but probably not. It seems like a lot of work doing a thankless task. The requirements are not really that simple (Gerald listed most of the important parameters in post #60). And one would ideally go beyond this to get better control of silver - multi-stage fixers to get the silver concentrated in the first tank, while minimizing carryout loss to the wash water from the second (or even third) tank.
Originally Posted by polyglot
My intention was to dispell the notion that such information is commonly available on the Internet. Even in this thread, several people have implied that they COULD do it, yet as far as I can see they have not. (I'll bet a dollar that Worker 11811 [post #62] would turn his silver-quarter cathode black with sulfide in less than 2 minutes).
Very briefly, the main difficulty with fixer is that one needs a good supply of free silver ions near the cathode, and these tend to disappear quickly. If they're not there, the result will probably be production of silver sulfide. The main ways to prevent this are 1) increase agitation at the cathode, or 2) reduce the plating current. With good agitation, in a C-41 type fixer, with silver concentration above 1 gram per liter, you can probably safely run a current density of about 5 to 10 amps per square foot of cathode area.
Without agitation, I don't have any experience, but the Silver Magnet may be a good example. You could make some estimates from the specs. As a wild guess, I'd say the current density may be about 100 times lower than with a well-agitated system. The Silver Magnet seems like a fairly elegant design for a low-volume plug-n-play system.
Last edited by Mr Bill; 04-18-2013 at 01:30 AM. Click to view previous post history.