dave_cheng1 Posted May 13, 2005 Share Posted May 13, 2005 This may be a stupid question as Kodak SM chemicals are designatedfor commercial SM processors only. However, if I understand correctly,for example of C-41 SM developer F1 and F2 are really just developerreplenisher. It is used with no mixing to replenish working C-41developer with precison small quantity programmed and controlled bythe SM processor. My question is if I use precision plastic syringe to inject correctamount of part A, B and C from SM chemical F1 or F2, according toKodak processing manual, to my used C-41 developer (used workingsolution) and use the replenished working solution on my JOBO ATL-2300rotary processor, will it work at all? Does it make sense trying todo that? I found a way to buy SM chemicals finally. And it seems to bethe only way for me to get larger quantity of chemicals for my JOBOmachine now. Ron, are you there? You may be the only person who hasthe answer for me. Thanks. Link to comment Share on other sites More sharing options...
dave_cheng1 Posted May 15, 2005 Author Share Posted May 15, 2005 According to Kodak C-41 SM processing manual, SM chemicals are used directly to replenish working solutions with no pre-mixing. For example, Part A, B and C of the SM developer are injected directly with a fixed ratio of A:B:C:water into working developer in the processor. As long as the ratio is strictly kept constant the rate of replenishment can be determined by running control strips. SM processor is required to ahcieve precison injection to keep the ratio contant and to regulate the rate of replenishment. It looks to me that Kodak SM chemicals are really no different from regular C-41 chemicals in terms of processing time and processing steps. So C-41 is C-41 regardless it is C-41 SM or just C-41. If I pre-mix C-41 SM chemicals I should be able to use it just like regular C-41. C-41 SM chemicals seem a good alternative for me. The SFO Bay Area is a region about 100x50 miles in size with a population of 7.1 millions. Somehow in such a large metropolitan region I can't find a Kodak dealer or supplier that sells a 3-1/2 sized C-41 developer without ordering a quantity of 4 or more. Is it Kodak marketing or is it film is dead? I don't know. But it looks to me Kodak marketing is working toward killing films. Anyway, it seems I am able to get a supply of SM chemicals from a minilab owned by a guy who is willing to let me buy some from him. I hope to be able to keep my comsuption of films alive and my ATL running through this summer. Link to comment Share on other sites More sharing options...
discpad Posted May 15, 2005 Share Posted May 15, 2005 Dave, I would suggest mixing the replenisher with (most of) the water, then meter in A, B, & C; then top off with water. Fuji Hunt C41 chemistry is used more and more these days, since it costs less... Link to comment Share on other sites More sharing options...
dave_cheng1 Posted May 16, 2005 Author Share Posted May 16, 2005 Dan, Kodak SM chemical F1 and F2 contain part A, B and C in separate bottles. The processing manual gives a ratio of A:B:C:water to replenish the working solution without pre-mixing. SM processors are programmed to release part A, B, C and water precisely at the ratio into the working solution. So I think what I can do with the SM chemical is to pre-mix part A, B, C and water at the same ratio to make up the replenisher. The ratio of A:B:C:water need to be accurate or the resulted working solution may not have the correct concentration of each ingredient of the developer for standard C-41 process. I guess I don't understand your "top up with water" part. It will make the replenisher in incorrect concentration. I will keep looking for Fuji-Hunt chemicals in the Bay Area. I have never used it. But I am willing to give it a try. Link to comment Share on other sites More sharing options...
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