but the question is

o you rally need HCA for film or RC paper, since there are no fibers for the hypo to clinc to in the first place. especially for RC papers,there is such a thing as 'overwashing'.
HCA is outstanding at getting the purple out of Kodak TMAX films.
I tone all my RC prints in Selenium 25% per Kodak, I fix for 60 seconds in fresh 1:4 KODAK RAPID FIX w/Hardener, rinse for 15 seconds then right into the toner for 3 to 5 minutes, rinse, into fresh HCA for a minute, wash in running water for 2 minutes, dry on a Ilfospeed dryer.
My FB routine is complicated, I do a bit of selenium followed by Kodak Blue toner (gold toner) lots of washing, a hardener step to keep the prints from sticking to my dryer......