Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 75,736   Posts: 1,670,382   Online: 860
      
Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 23
  1. #11
    jnanian's Avatar
    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    18,089
    Blog Entries
    14
    Images
    71
    Quote Originally Posted by Ian Grant View Post
    "dichrilic fog " You talking about the orange fog from Mick Fagan's bonfire last week ?
    noooo
    green metallic stain on the emulsion ...
    it can be removed by using farmer's reducer
    and then refixing the film ...

    the kind folks at kodak had no clue ...
    i had to talk to paul krot ( sprint systems ) for help ...
    he was THE BEST, and the photochemistry he developed
    is really good too! ( much better than that t max stuff! )

  2. #12
    Ian Grant's Avatar
    Join Date
    Aug 2004
    Location
    West Midlands, UK, and Turkey
    Shooter
    Multi Format
    Posts
    16,939
    Images
    148
    Kodak UK knew about the Dichroic fog, it's why in the UK it wasn't recommended for large format Tmax Films and the datasheets carried a warning.

    I found it strange that Kodak released a specialist product that didn't work properly with any Tmax films, I stopped using the dev because I switched to LF for most of my personal work at the time.

    Ian

  3. #13

    Join Date
    Jul 2007
    Location
    Netherlands
    Shooter
    Medium Format
    Posts
    5,682
    Isn't a fixer problem, easily avoided by making sure you are using fresh fixer?

    I assume you apply Farmer's to the back of the film only.
    Else the remedy may be as bad as the thing it is supposed to fix.

  4. #14
    jnanian's Avatar
    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    18,089
    Blog Entries
    14
    Images
    71
    Quote Originally Posted by Ian Grant View Post
    Kodak UK knew about the Dichroic fog, it's why in the UK it wasn't recommended for large format Tmax Films and the datasheets carried a warning.

    I found it strange that Kodak released a specialist product that didn't work properly with any Tmax films, I stopped using the dev because I switched to LF for most of my personal work at the time.

    Ian

    in the states at least, there are 2 versions of the tmax developer straight tmax and tmax rs.
    when it first came out, the good folks at kodak recommended that i use the straight tmax
    not the rs for sheet film ... it should have been the other way around ...
    RS does not cause the fog ... straight tmax does ...

    good luck with your test qg ... have some farmers reducer handy
    ( or maybe some oxiclean! ) it might work well for removing spots

  5. #15
    Ian David's Avatar
    Join Date
    Dec 2006
    Location
    Brisbane, Australia
    Shooter
    Multi Format
    Posts
    1,079
    Images
    16
    Quote Originally Posted by Krzys View Post
    Dont trust it. I was given expired tmax and it ruined the roll. Chunks of solidified developer and stains everywhere.
    I gave this bottle of Tmax to Krzys... sorry
    It was a couple of years old and had developed a slight loss of pressure inside the bottle. Otherwise it looked to be in OK condition. But apparently it made a mess of the film...

  6. #16
    jnanian's Avatar
    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    18,089
    Blog Entries
    14
    Images
    71
    Quote Originally Posted by Q.G. View Post
    Isn't a fixer problem, easily avoided by making sure you are using fresh fixer?

    I assume you apply Farmer's to the back of the film only.
    Else the remedy may be as bad as the thing it is supposed to fix.
    i mixed the farmers reducer as recommended by someone
    who developed his own line of photographic chemicals.
    you can read about him below ... he was quite a guy.

    it was mixed and put in a small hanger-tank.
    i put my film in hangers and then into the solution.
    after the fog was removed i refixed, and washed it ...
    the reducer worked very well ...

    the fog had nothing to do with the fixer. it was fresh fixer ..
    the problem was that the non rs ( rotary system / replenishment system )
    tmax developer was known to cause dichroic fog on sheet film
    ...
    unfortunately, they didn't tell me this important bit of information when i called at kodak (originally)
    and asked their "professional division" about the developer and which version i should use
    for 4x5 film. i was told to use the wrong stuff. :rolleyes:

    http://www.as220.org/darkroom/who-is-paul-krot.html
    http://www.sprintsystems.com/
    Last edited by jnanian; 09-27-2009 at 08:48 AM. Click to view previous post history. Reason: Q.G. pointed out i am a bad spelller

  7. #17

    Join Date
    Jul 2007
    Location
    Netherlands
    Shooter
    Medium Format
    Posts
    5,682
    I think i would rather try an acid fix (perhaps with increased acidity by adding citric acid) than Farmer's.

    But i'd rather not have to at all, of course.
    I never experienced any fogging problems with 'straight' T-Max developer though.

  8. #18
    jnanian's Avatar
    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    18,089
    Blog Entries
    14
    Images
    71
    Quote Originally Posted by Q.G. View Post
    I think i would rather try an acid fix (perhaps with increased acidity by adding citric acid) than Farmer's.

    But i'd rather not have to at all, of course.
    I never experienced any fogging problems with 'straight' T-Max developer though.
    well, if you use it with sheets, and run into trouble,
    you know what you can do if your citric acid + fix doesn't work
    they have recommended the rs version for sheets for the past 15+ years,
    the whole dichroic fog thing is olde news ...

    i gave up the tmax stuff for something else
    it was GAF UNIVERSAL DEVELOPER ...
    found on a windowsill in a big red can.
    it had suffered through countless 100º+ summers and -20º winters
    now, that stuff was old!
    and it works like a charm
    Last edited by jnanian; 09-27-2009 at 08:49 AM. Click to view previous post history. Reason: Q.G. pointed out i am a reaally bad sppeler

  9. #19

    Join Date
    Jul 2007
    Location
    Netherlands
    Shooter
    Medium Format
    Posts
    5,682
    Would it be a good idea, perhaps, to start calling it dichroic fog?

    Now, if your GAF still works, i'll definitely give my T-Max a try.

  10. #20
    jnanian's Avatar
    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    18,089
    Blog Entries
    14
    Images
    71
    Quote Originally Posted by Q.G. View Post
    Would it be a good idea, perhaps, to start calling it dichroic fog?

    Now, if your GAF still works, i'll definitely give my T-Max a try.
    LOL

    that might be a good idea
    you should work for VC magazine
    they could use a copy-editor!

    the gaf-stuff was the best,
    much better than the other stuffs ..

Page 2 of 3 FirstFirst 123 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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