Archived posting to the Leica Users Group, 2001/05/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Shel, Some films and/or developers include times for continuous agitation, and obviously those are good starting points. If no such times are specified, then you have to do your own testing. For example, I am currently in the process of determining my development time for the new Ilford Delta 400 in Ilfotec DD-X 1+4, because I find that the times in the data sheet result in too dense negatives. The great thing about the Jobo is that because of the ability to control temperature and the constant rotation you are assured consistency and can experiment with confidence. Nathan Shel Belinkoff wrote, in part: > My concern is this. If I understand the JOBO's operation correctly, > the tank is in continual rotation throughout the entire developing > process. If that's the case, it would seem that shadow density and > highlight density would be substantially changed from using small > tanks by the constant agitation, and that a different EI and perhaps > substantially less developing time would be needed for a given > film/developer combination. > > How do those of you who use the JOBO compensate for the different > agitation of the processor vs using a small tank with manual > agitation? > -- > Shel Belinkoff > mailto:belinkoff@earthlink.net > "... there is no point in pressing the shutter > unless you are making some caustic comment > on the incongruities of life" - Phillip Jones Griffiths - -- Nathan Wajsman Herrliberg (ZH), Switzerland e-mail: wajsman@webshuttle.ch General photo site: http://belgiangator.tripod.com/ Belgium photo site: http://members.xoom.com/wajsman/ Motorcycle site: http://www.geocities.com/MotorCity/Downs/1704/