Switch to English Language Passer en langue franįaise Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,970   Posts: 1,523,496   Online: 870
      
Page 2 of 2 FirstFirst 12
Results 11 to 15 of 15
  1. #11
    Jan Normandale's Avatar
    Join Date
    Feb 2006
    Location
    Toronto, Canada
    Shooter
    Multi Format
    Posts
    14
    I'm about to start using a CPE 2 and have been using a Paterson tank. Are there any threads showing images using a Jobo vs "by hand" developing. The times are considerably different and I'm wondering how to deal with the "temp loss" curve of manual vs continual temp of Jobo with substantially shorter developing times.

  2. #12

    Join Date
    Feb 2011
    Shooter
    35mm
    Posts
    127
    Like PE I've tried C41 processing at lower temps and could never make it work. When I was developing colour I always used Kodak Flexicolor chemicals but I doubt that there is any magic ingredient in Tetenal any other brand that would improve the result. To prove the point to my own satisfaction I once shot four identical films under studio conditions using colour targets as the subject and had one processed by a pro lab, another at the local Kodak 1 hour lab and I developed the other 2 - one at 37degC and the other at 24degC, both in Flexicolor. Can't remember the timing I was using for the 24deg process but I recall it was long and based on a consensus of advice gleaned from various sources at the time (mainly magazines) and seemed to produce correct overall density with negs that looked OK.
    I learnt a lot about neg development from the experiment because not only did I establish that the negs developed at 24deg contained a virtually uncorrectable cyan cast but also that the standard of my processing even at 37deg fell a bit short of both the lab processed films - printable but lacking their neutrality and clean colours. There was very little difference between the dip and dunk pro lab result and the 1 hour lab down the street.
    The experiment caused me to get a Jobo machine for film processing. After much trial and error I was able to get results pretty much identical to a lab but I always re-ran the comparison test at least half yearly until I stopped processing colour film a few years ago.

    OzJohn

  3. #13
    hpulley's Avatar
    Join Date
    Oct 2010
    Location
    Guelph, Ontario, Canada
    Shooter
    Multi Format
    Posts
    2,214
    Images
    75
    With plastic Paterson Super System 4 tanks and a simple water bath I get excellent temperature control. In fact I tried without a bath once using a higher starting temperature and it works too but I feel better using the water bath so that is what I stick with. 39C/102F at the start works well for me, I just have to look at the stopwatch to make sure I don't do an unintentional push as 3:30 goes by fast...
    Harry Pulley - Visit the BLIND PRINT EXCHANGE FORUM

    Happiness is...

  4. #14
    Greg Davis's Avatar
    Join Date
    Feb 2004
    Location
    Crestview Hills, KY
    Shooter
    8x10 Format
    Posts
    1,896
    There is a thread about the Rollei C-41 kit here somewhere. The kit claims you can process at 20ēC with extended times, and I tried it with comparisons against Kodak Flexicolor at both 20ēC and 38ēC. All results at 20ēC were awful. With scanning and heavy color manipulation in Photoshop I was able to almost match the color from the normal Kodak stuff at 38ēC, but saturation was off and it just wasn't right.

    I have used a warm water bath to do standard inversion processing with great results, but I too use a Jobo for my color work.
    www.gregorytdavis.com

    Did millions of people suddenly disappear? This may have an answer.

    "No one knows that day or hour, not even the angels in heaven, nor the Son, but only the Father." -Matthew 24:36

  5. #15

    Join Date
    Apr 2010
    Shooter
    35mm
    Posts
    78
    I use Unicolor kits but I suspect they are similar. I use a metal 16 oz tank with an empty spiral on top, and use 15 oz of chemistry. Two inversions every 30 seconds, with thermostatically controlled water bath. I generally follow the directions and always get good results. Good luck.

Page 2 of 2 FirstFirst 12


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin