Archived posting to the Leica Users Group, 2002/01/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]slightly tangential, but what tests (if any) do people use to check freshness of their chemistry? with developer, could you drop in film leader for some amount of time, stop fix and wash and then check density? with fixer, poeple drop in a film leader and measure time to clear and then fix for 3 times that amount. but how clear is clear? i've had old fixer that left the film base about .10 denser than the same film with fresh fixer. (i refixed and the film was fine). how about freshness of hypo-clear? with some of the larger chemistry sizes we are all encountering, it would be reassuring to be able to have ways of checking the potency of our brews. not all of us go through 5 liters of xtol in a week! thanks, - -rei > From: Richard Comen <rpcomen@mcn.org> > > Almost no developer deteriorates more rapidly then developers with > phenidone in the formula.... - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html