Wayne Posted February 19, 2017 Share #1 Posted February 19, 2017 (edited) Advertisement (gone after registration) Do you use a water bath when preheating color negatives during c41 process?, or, do you simply preheat the negatives, dry, and in the tank, for several minutes prior to beginning chemical process? In past I have used the water bath, as the process instruction provide. I recently read that you should not use water for preheat. I notice that my Kodak film preheat bath always comes out colored; the various other brands, Lomo, Fuji do not. Edited February 19, 2017 by Wayne Quote Link to post Share on other sites More sharing options...
Advertisement Posted February 19, 2017 Posted February 19, 2017 Hi Wayne, Take a look here Do you pre-wet color negatives C41. I'm sure you'll find what you were looking for!
Herr Barnack Posted February 19, 2017 Share #2 Posted February 19, 2017 (edited) When I first started developing film, I did not do a water pre-wet before introducing the developer, but then I was developing E6. For B&W and C41, I started doing a 30 second pre-wet before developing. I cannot say that I have noticed a significant difference in my negs but proponents of pre-wetting say it keeps the emulsion from absorbing too much developer because the emulsion is dry and that pre-wetting promotes more even development. Edited February 19, 2017 by Carlos Danger Quote Link to post Share on other sites More sharing options...
Doc Henry Posted February 19, 2017 Share #3 Posted February 19, 2017 (edited) Hi Wayne , no I don't but I put the tank with dry film in the water bath 15 minutes before I put developer, in accordance to the instructions of Tetenal. Rg Henry Edited February 19, 2017 by Doc Henry Quote Link to post Share on other sites More sharing options...
Ko.Fe. Posted February 19, 2017 Share #4 Posted February 19, 2017 I have to do it with 120 format FujiFilm C-41. The amount of dark colored crap it was spitting into my C-41 kit was incredible. Quote Link to post Share on other sites More sharing options...
Wayne Posted February 19, 2017 Author Share #5 Posted February 19, 2017 Thanks for the information. I just did 35mm rolls of Ektar and Lomo 400, as well as a 120 roll of Fuji Pro 400H without benefit of water during pre heat. I pre heated, dry, for about 10 minutes. The negatives are not dry yet, but they appear to be OK from a quick glance. More later. I dispensed with the squeegee this time as well. I think it was scratching the negatives. Thanks again. Quote Link to post Share on other sites More sharing options...
chrism Posted February 19, 2017 Share #6 Posted February 19, 2017 I always presoak films, although I too have read all sorts of strong opinions both ways. Mostly I like to see the lovely colours that come out with the presoak! Kodak films give the best approximation of the colour of a green garnet, and somehow I find that satisfying! C. 1 Quote Link to post Share on other sites More sharing options...
Bobitybob Posted February 19, 2017 Share #7 Posted February 19, 2017 Advertisement (gone after registration) You don't mention if you use a kit or not. As far as I can recall the Tetenal C41 kit states to pre-warm the Developing Tank but the Fuji Hunt X-press kit states a pre-soak at 38 degrees for 5 minutes. I use the Fuji Hunt kit mostly and you do see discolouration of the pre-soak water with some films. I'm not sure if this has an effect on different films if you mix them in the tank, but I now try to develop batches of the same film where possible just in case. Hope that's helpful. 1 Quote Link to post Share on other sites More sharing options...
105012 Posted February 19, 2017 Share #8 Posted February 19, 2017 For rotary processing a pre-wet is not recommended for C-41, but is recommended for B&W. JOBO did extensive testing and found that pre-wet, post dev wash with water or stop, all introduced inconsistencies. They reported that Kodak said that the bleaching step relies on the dev to be present for proper functioning. See JOBO Quarterly number 4 for details. Quote Link to post Share on other sites More sharing options...
250swb Posted February 20, 2017 Share #9 Posted February 20, 2017 The Tetenal instructions are clear, you pre-heat the tank/drum, and not pre-wet the film. 1 Quote Link to post Share on other sites More sharing options...
Martin B Posted February 22, 2017 Share #10 Posted February 22, 2017 Yes, always - I water the color film within the tank with 40-43 deg C warm water for 2-3 minutes first and rinse off the colored dye before adding the C-41 developer solution. I am using the Unicolor C-41 developer set. IMO it never hurts to pre-equilibrate the film and the inside of the tank with warm water. The color films which I used so far all had an either green or blue dye washing off. Quote Link to post Share on other sites More sharing options...
tobey bilek Posted April 2, 2017 Share #11 Posted April 2, 2017 Amazing how amateurs know more than the manufactures about prewet and agitation. Also amazing how misinformation spreads on the internet. Quote Link to post Share on other sites More sharing options...
Bill Clark Posted April 3, 2017 Share #12 Posted April 3, 2017 I use Freestyle chemistry for developing with C-41 chemistry. The instructions on page 2 show pre-soak for 1 minute at 102 degrees. Here is link to pdf instructions: http://www.freestylephoto.biz/static/pdf/product_pdfs/arista/Arista-liquid-C41.pdf 1 Quote Link to post Share on other sites More sharing options...
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