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  1. #321

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    So, what colour should the Developer C be? Yellow, Purple, Orange or Red? Mine was yellow and I didn't notice anything bad on my negs other than Portra 400 (new) and Ektar 100 coming out a bit pinkish (colour went back to orange after drying).

    My working solution now changed colour to green-black after 3 films and the bleacher is full red. Are these normal? Haven't used another c-41 developer before, only done b&w's.

  2. #322
    jbl
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    Mine is yellow. Purple is bad. I don't know about the other colors :-).

    -jbl

  3. #323

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    Thank you I have also confirmed it on Macodirect site, it was in small letters in the listing. I saw the previous comments and misunderstood that it should be close to red. But yellow is nicer!

    Besides that, is anyone using a stop bath? I used the Kodak indicator stop bath I am using with b&w's and didn't notice any bad effect on the Portra 400. Haven't scanned it yet, but at least there were no defects on the mask. I know the bleach has the same effect, but I am trying not to contaminate the chemicals with each other, except for the stop bath, in order to prolong their life, so instead of doing a wash between developer and bleach I did stop bath and water bath (both at 38 degrees, then bleach at around 36).

  4. #324

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    Yes, you can use a Stop bath after the C41 developer.
    I am using a water rinse after the C41 developer and after the Bleach but I am using the 250ml concentration +20ml extra water for the 270ml 2523 rotary Jobo development and re-use it only once. (2x2 135-36 or 2x2 120 roll films). Due to the fact I am printing on RA-4 I want to have a minimum of color shift in the same type CN films. In this way it's a good compromize in using the C41 chemicals.

    Best regards,

    Роберт
    My favorite store: http://www.fotohuisrovo.nl

  5. #325
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    Wow... 32 page thread...

    I just ordered the 50 roll kit from Freestyle but was wondering how much working solution that would make (1 liter, 2 liter, etc). Does anyone know? It does not state that on the Freestyle site at http://www.freestylephoto.biz/66016-...ng-Kit-50-roll

    The reason that information is important to me is because I develop one of three ways: a.) 16 oz/500ml steel tank for 1 roll of 120 b.) 32 oz/1 liter steel tank for 2 rolls of 120 or c.) 6 sheets of 4x5 in the HP Combi tank that uses 1 liter.

    Based on the Freestyle website I take the information to mean that 50 rolls of 35mm/36 exp OR 120 medium formal rolls can be developed with the kit. There is no mention of 4x5 sheets in an HP Combi tank.

    I scanned most of the pages but didn't seem to find clear answers on the following:

    1.) Anyone figure out a reasonable calculation for how many sheets of 4x5 can be developed in the HP Combi tank using 1 liter of working solution before dumping?

    2.) The PDF instruction sheet on the Freestyle site says 6 rolls of 35mm/36 exp or 120 films per 500ml or working solution. Based on this thread that seems very conservative. Anyone have advice based on experience for a realistic number of 120 films per 500ml?

    Excellent thread, thanks.


    Tim

  6. #326
    jbl
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    I believe it's a 2.5 liter kit. I think they say 3-5 rolls per 250ml solution, but their math is for 5 rolls per 250ml, hence 2.5 liters does 50 rolls. If you look on the Maco Direct website (http://www.macodirect.de/digibase©-m...1°-p-2340.html), it seems to imply that the math is for 6 rolls at ISO 100, 5 at ISO 400.

    I've only tried 4 rolls in a given 250ml, the first three were fine, the fourth was not, but I messed up on that, it wasn't the chemicals. They were about 2 months old, though, but I'm certain it was my fault.

    -jbl


    -jbl

  7. #327
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    Anyone have tips on how I can tell when to discard my C-41 chemicals and make a fresh batch?

  8. #328
    jbl
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    I've been looking for that too. I don't think there's a way to know. The last batch I had was just fine for 2 months in a half-filled glass bottle sitting in a cabinet.

    -jbl

  9. #329
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    Im getting ready to crank a bunch of 120 rolls and some 4x5 sheets in a HP Combi tank this week.

    I don't know if my assumptions are right or not, but I am going to start with the assumptions that I can do at least 10 rolls of 120 with 500ml/16 oz.

    I am making a rough guess that a sheet of 4x5 film is approximately equal to 4 frames of 6x6 120. In other words 2 4x5 sheets is equal to a roll of 120. Based on that assumption I am guessing I should be able to get 20 sheets per 500ml or 40 sheets per liter.

    Based off of this thread I am guessing I may get a lot more, but I will use this logic as a starting place and then watch the results a lot closer.

    Sending out my 4x5 sheets gets expensive really fast, so I am hopeful things go as planned!

    Tim

  10. #330
    jbl
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    It should be calibrated around 80 square inches of film, so 1 roll of 135-36 = 1 roll of 6x6 120 = 4 sheets of 4x5 = 1 sheet of 8x10.

    500ml is rated for 6-10 rolls of 135-36. I guess I'd recommend doing the important stuff first and letting us know how the remaining work :-).

    -jbl



 

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