Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,000   Posts: 1,524,333   Online: 705
      
Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13
  1. #11

    Join Date
    Sep 2002
    Location
    Willamette Valley, Oregon
    Shooter
    Medium Format
    Posts
    3,684
    Quote Originally Posted by Richard Jepsen View Post

    Fotokemika's limited instructions mentions a fix time of
    4-6 min with efke FF-1, a rapid fix.

    I use TF-4 (film strength) ... To accommodate EMAKS
    I increased my normal 60s fix routine to 120s.

    I process to archival standards using Ilford's archival
    fix/wash recommendations. The Fotokemika's
    recommended long fix times allow the paper
    to absorb fixer.
    Your fix routine is a mix of contradictions & errors.

    First: it is a paper no one has ever encountered which
    takes 4-6 minutes in film strength rapid fix. Especially
    the way your fixer is being used.

    Second: TF-4 needs no HCA treatment. So, the 10 of the
    Ilford 5-10-5 sequence is a waste as such. It might count
    as wash time.

    Third: Once you've strayed from ONE minute you've
    strayed from Ilford's 5-10-5 sequence. When Ilford
    in the early 80s announced the sequence the time
    in fix was 30 seconds; later 60 seconds. Large
    prints need the extra for a more even fix.

    Forth: I've not mentioned the word Archival. Ilford
    no longer espouses such a fix routine; no longer has
    an Archival anything. IIRC the phrase now is Optimal
    Permanence. The OP routine centers about remaining
    within a fixer of very low silver levels. They highly
    recommend the two bath fixer.

    Approximately 3/4 of your TF-4 fixer is going down the
    drain unused. Even Ilford's now gone Archival Processing
    Sequence allowed for 40 8x10s per liter of film strength
    THEIR fixer. That is no longer the case. Ten prints is it
    if the OP low silver levels are to be met. The way to
    greater capacity? Put 40 through the first and
    second bath of a two bath fix. Dan

  2. #12

    Join Date
    Jul 2006
    Location
    Oklahoma, USA
    Shooter
    Med. Format RF
    Posts
    680
    The last poster is correct concerning the low number of prints per L to reduce fix silver content. I've reviewed the literature many times before I settled on my fix process.

    The rest of my process is to lightly tone in KRST and extend the final tray wash to 25 to 30 min with no less than 6 to 7 fill and dumps. I've been confident of my processing since it is conservative.

    I have a small dry darkroom and use the 1 min fix routine sacrificing economy for convenience. Theoretically my process should have OP with typical papers. But, EMAKS instructions recommends a 4-6 min fix time. I have no idea why their time is different from Ilford/Agfa/Forte. I made the post to receive feedback on the best course of action.
    RJ

  3. #13

    Join Date
    Jul 2006
    Location
    Oklahoma, USA
    Shooter
    Med. Format RF
    Posts
    680
    Most likely the processing instructions are for paper strength vs film strength ratios. The manufacturer provided minimal instructions. Liquid-concentrate fixers are normally faster than a powder derived fix.
    RJ

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