Proper dilution of Kodak Rapid Fixer Solution A ???

Phil, If you are using a longer fixing time (2-4 minutes for RC and 5-10' for
fiber base papers) in a tray and do not need a hardening fixer, you can use the
paper dilution of 1 portion of Part A to 7 portions of water. If a
non-hardening fix is prerred, use Part A only - Part B is the hardener.

The more concentrated 1:3 ratio is used in rapid roller transport B&W paper
processors with fix and wash times in the range of 20 seconds each. Only part A
is used in this application as the hardener would shrink the emulsion and not
allow proper fixing or wash to take place in such a short time.
Bernie

s (Jazztptman) wrote in message ...
Phil, If you are using a longer fixing time (2-4 minutes for RC and 5-10' for
fiber base papers) in a tray and do not need a hardening fixer, you can use the
paper dilution of 1 portion of Part A to 7 portions of water. If a
non-hardening fix is prerred, use Part A only - Part B is the hardener.

I need to clarify some things Both the fixer and paper instructions
suggest that the fixing time with rapid fixer is 1 minute for RC,
whereas the instructions for Kodafix suggest 2 minutes for RC. So when
you say to fix RC for 2-4 minutes, is it because the directions are
not conservative enough, or because leaving out the hardener
necessitates a longer fixing time? I would have hoped that, with
_rapid_ fixer, I would not have to fix for as long as with Kodafix.

The other thing is that I what I am starting with is not the powder,
but the liquid concentrate of Part A. Do I still use 1:7 part A to
water with the liquid concentrate? Ther reason I ask is that the
instructions suggest the relative amounts to make one gallon (which is
way more working solutiion than I need at any given time) and it does
not look to me like the dilution, based on extrapolation, would work
out to 1:7.

Thanks!

--Phil

Phil said: I need to clarify some things Both the fixer and paper
instructions suggest that the fixing time with rapid fixer is 1 minute for RC,
whereas the instructions for Kodafix suggest 2 minutes for RC. So when you say
to fix RC for 2-4 minutes, is it because the directions are not conservative
enough, or because leaving out the hardener necessitates a longer fixing time?

Phil I was going by memory. I think you're correct and Kodak calls for 1-2
minutes with RC papers.

I would have hoped that, with rapid fixer, I would not have to fix for as
long as with Kodafix.

Kodafix (the liquid concentrate) is also a "rapid" ammonium hypo fixer. Not
much different from Rapid Fixer. The only "slow" fixer Kodak has is the powdred
Kodak Fixer, which is a sodium hypo fix.

The other thing is that I what I am starting with is not the powder, but the
liquid concentrate of Part A. Do I still use 1:7 part A to water with the
liquid concentrate? Ther reason I ask is that the
instructions suggest the relative amounts to make one gallon (which is way more
working solutiion than I need at any given time) and it does not look to me
like the dilution, based on extrapolation, would work out to 1:7.

Yes, 1:7 for the liquid concentrate Rapid Fixer. 1 part of part A concentrate
to 7 parts water.The directions probably also call for some part B which is why
the volumes do not work out to an exact 1:7 dilution. Good luck and have fun
printing.



Bernie