Quote Originally Posted by fschifano View Post
Ammonium thiosulfate (aka rapid) fixers work much faster than sodium thiosulfate based ones and will clear the notoriously difficult to fix Kodak's Tmax films in 2 to 3 minutes, with complete fixing accomplished in 7 minutes or so. Foma films fix out very quickly, and rapid fixers will clear an undeveloped film chip in a minute or so.
My experience is that Foma films clear in rapid fixers (Kodak Hardening Rapid Fixer, TF-3, or Suzuki's Neutral Rapid Fixer) in 30 seconds or less. Those films are very quick to clear. IIRC, the instructions for these products say to fix RC papers for ~1 minute. I don't know if RC papers vary amongst themselves in necessary fixing time. Even if they do, I certainly agree that a 10-minute fixing time is excessive, except maybe when using nearly-exhausted standard (sodium thiosulfate) fixer.