Archived posting to the Leica Users Group, 2002/01/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> From: "Frank Filippone" <red735i@earthlink.net> > > Rei... the best synopsis that I have read on developer exhaustion control... > thanks > I think I need to go buy that cookbook..... it's an invaluable resource, more practical than _the negative_, more comprehensive than picker, more up-to-date than either, as well as being an enjoyable read with many fascinating asides and quotes. and it has a plastic ring binding, perfect to reading in the darkroom between processes! you can get (20% off your first purchase) from : http://www.bhusa.com/focalbooks/us/subindex.asp?maintarget=&isbn=&country=United+States&srccode=&ref=&subcode=&head= do a search for "cookbook" when i went to that site, they say the second edition is due to be published in march 2002! > Developer exhaustion, when used LOCALLY, is the method called > compensation... Basically, WITHOUT agitation, you let the film cook for a > while. Locally, the developer ions get exhausted wher ther is lOTS of > silver that has been exposed to light.. those areas that have had little or > no exposure to light take longer to exhaust. The effective effect is that > the shadows get developed with more time than the highlight areas. Great > solution for LF film.. kinda worthless to 35mm guys.... ( for those that > REALLY care to use this with roll film, you develop horizontally, in a big > long tray ( that is what a pipe is called when it is cut in half along its > length and capped on both ends)) in the dark. No agitation. Usually done > with low activity developers. stand developing, page 37-38. - -rei - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html