Of course, I meant "pull" processing, not push. Sorry. Shel Belinkoff wrote: > > Yes, you're more or less correct in that. Kodak suggests times similar > to what JCO is using for small tanks with intermittent agitation, > although those times are for standard processing, not "push" > processing. IIRC, Kodak suggests about 25% - 30% less time when pushing > one stop, which is about what JCO's doing - he's using an EI of 250. > Times for rotary tanks would be substantially different. Further, Kodak > also states in the Darkroom Dataguide that the times they give are for a > diffusion enlarger, and that their times should be reduced 20% - 30% for > printing with a condenser enlarger, with about a 1/3 stop increase in > exposure. > > There are plenty of people using constant agitation with the Jobo (and, > I suppose, similar setups) but developing time and EI are substantially > different than those for hand processing in small tanks. > > It seems that JCO has not established a correct EI for the film relative > to the processing style and printing process he's using. The > information on rotary processing for TMY can be found at: > > http://www.kodak.com/global/en/professional/support/techPubs/f32/f32c.shtml#1148514 > > That's only a recommended starting point, of course. Based on Kodak's > recommendations, he's way off in both EI and developing times, enlarger > type and printing process notwithstanding. One of the reasons I > suggested the Greenspun board is that JCO can get opinions from several > people who've gone through the process and arrived at the other end > getting good results. > > One of the things mentioned in some discussions about TMY and the T-Max > developers, is that water quality is a major consideration. Water > hardness and chemicals in the water have been shown to have deleterious > effects on the quality of the negatives, and the use of distilled water > is highly recommended. > > Paul Stenquist wrote: > > > > I've tried "recipes" similar to the one > > that JCO is using. It's right fromt he > > Kodak Darkroom Dataguide, with more exposure > > and less development. It works rather well, > > but it is designed for only intermittent > > agitation. > > -- > Shel Belinkoff > mailto:[EMAIL PROTECTED] > http://home.earthlink.net/~belinkoff/ > You can't have everything. Where would you put it?
-- Shel Belinkoff mailto:[EMAIL PROTECTED] http://home.earthlink.net/~belinkoff/ You can't have everything. Where would you put it? - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
