Quote Originally Posted by rjas View Post
How long can I be saving HCA? I was told
that it oxidized in a matter of hours.
It is that uncertainty with the usual sulfite based
HCAs on the market that has me ready to switch to
Agfa's recommended sodium carbonate based HCA.

A study quoted in a post to rec.photo. darkroom
recently told that sodium sulfite was, IIRC the exact
words, "as good as any other". That is, not any better
than some others. I suspect Agfa's recommended
sodium carbonate is as good as sulfite and it
does not oxidize. Agfa's instructions may
still be on the WWW. Dan