Archived posting to the Leica Users Group, 2005/11/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On 11/29/05 1:24 PM, "Adam Bridge" <abridge@gmail.com> typed: > I just have to wonder if there's something else interfering with > things - that there is something in the water Feli is using to dilute > his XTOL solution (which he mixed with either DI or distilled water) > is having an effect on the development. > > Looking at the original XTOL data sheet for Tri-X 135 @ 400 diluted 1:1 you > see > > 65 - 8.75 > 68 - 8.25 > 75 - 7 > 80 - 6 > > Your method of agitation will change these times. The Kodak method, > which requires a darkroom and the addition of the film rolls directly > into the already filled tank and then putting on the top, has a 5-7 > inversion cycles in 5 seconds then 30 seconds still and 2-5 cyles of > inversion every 30 seconds after that until the time is complete. > > Most of us, for dilute solutions of XTOL (1:3) allow much longer times > especially toward the end of the development cycle. I think I'm safe > in saying this. > > Times for 1:1 upwards of 13 minutes seem to imply water temperates of > 50 degrees F which seems darn cold for tap water. > > Adam > 50 degrees F? No I don't think so. Not less than 65. The Hydroquinone conks out. Which it doesn't have it in. But ignore that. But I still don't think they or anyone expects you do run film for some reason in 50 degree f water. You'd freeze your fingers off you'd need asbestos rubber gloves. Your emulsion would crack off in sheets when you unrolled it. I don't think your fix would work at that temp. I still think we should be sticking to the 68 to 72 range. Your mileage may differ. But then you'd be wrong! :) Mark Rabiner Photography Portland Oregon http://rabinergroup.com/