Oddball fixer dilution

I just bought a jug of Polymax RT Fixer and Replenisher to replace the

bottle of Ilford Rapid Fixer I finished off the other day. Reading

the label, it's obvious this is a rapid fixer, probably an acidic one

similar, overall, to other rapid fixer products (the only fixing agent

mentioned is ammonium thiosulfate). However, it's originally made for

use in automated paper processing machines, and recommends a dilution

of 1+3.

 

Question is, what dilution would I use for film? If the 1+3 is paper

strength (and why it would be, I don't know, since it would require

shipping a bunch of extra water) then I could dilute 1+1 to get the

same strength I get with Ilford at 1+4 -- but if, as I suspect, it's

based mainly on 60% ammonium thiosulfate solution, then 1+3 or 1+4 is

just right for film, and the one-shot use I've considered would

require diluting it further from that.

 

Does anyone know for certain? Or will I just have to depend on

clearing tests?

Dear Donald,

 

It used to be on the box, but Polymax T fixer is diluted 1:3 for film and 1:7 for paper.

This is Polymax RT, though, and didn't come in a box, it came in a 5 L. jug. However, it's probably the same except for additional preservatives for replenished use in a processor (and the higher strength is used to obtain a more rapid process). I'll presume it's the same basis, then, and start working out dilutions to use in a one-shot, two-bath fixing process. I figure suitable dilution should let me do several hundred rolls of film from this jug (which cost me $15, heavily discounted from retail). That will put off the day I need to find a source of sodium thiosulfate... ;)