Results 1 to 8 of 8

Thread: film...on film

  1. #1

    Join Date
    Aug 2004
    Posts
    159

    film...on film

    Hi.

    I've noticed lately that after developing, fixing, washing and drying 4x5 sheet film, there is a residue of some sort left on one side of the film. This....film, if you will, is like a haze, and wipes of very easily, sort of like condensation being wiped from a mirror or window.

    Anybody know what this might be, or, better yet, how to get rid of it?

  2. #2
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    4,636

    film...on film

    which film are you using? Are you using photo flo? Once I was using too strong of a solution and film dried with a haze.

  3. #3

    Join Date
    Aug 2004
    Posts
    159

    film...on film

    tmax 100 and fp4...
    and photoflo

  4. #4
    Donald Qualls's Avatar
    Join Date
    Oct 2004
    Location
    North Carolina
    Posts
    1,092

    film...on film

    First rule with PhotoFlo, in my experience (and this hasn't changed in about 35 years, AFAIK): use about half what Kodak calls for. I use it 1:500 instead of 1:200, and it's just right; the water sheets off the negatives nicely, and it dries clean enough that even 16 mm negatives still look good. You *can* save and reuse the working solution, though I don't (I use it for one session, which is up to four rolls or half a dozen sheets, limited by my population of clips for hanging and tubes for developing); toss it when stuff starts to grow in it.

    And if you're not already doing so, use distilled water to mix your PhotoFlo. IMO, you should do so for the final wash stage, too, to avoid mineral deposits when the water dries on the film surface.
    If a contact print at arm's length is too small to see, you need a bigger camera. :D

  5. #5
    Abuser of God's Sunlight
    Join Date
    Aug 2004
    Location
    brooklyn, nyc
    Posts
    5,775

    film...on film

    That last thing that Donald said.

    photo flow breaks the surface tension of the water, so more of it drips off, and so the water that remains doesn't stay in little droplets ... but it doesn't magically make minerals and impurities in the rinse water disappear. If they're present, some of them will stay behind when the water evaporates.

  6. #6

    Join Date
    Jan 2006
    Posts
    38

    film...on film

    Most of my experience is with 35mm and 120 formats, but I've developed several hundred rolls of film by hand and I've concluded:

    - It's a good idea to mix your wetting agent (Photo-Flo, LFN, FormaFlo, whatever) using distilled water.

    - It's a very good idea to use much less Photo-Flo than Kodak recommends. I'd go so far as to suggest 1:2000 or an even greater dilution. I don't Photo-Flo any more. Instead I use Photo Formulary's Forma Flo with 3 drops per 400 ml working solution.

    - I would agitate the film quite aggressively in the wetting agent for 2 minutes.

    I just processed my first 4x5 sheets yesterday and that same methodology appears to work for sheet film just fine.

  7. #7

    Join Date
    Apr 2006
    Posts
    1

    film...on film

    Hi Percy

    Is it kind of whitish residue wiped easily with the wet fingers? It just happened to me as well. Quite scary seeing it first time. Later I found out that Kodak advises not to use Tmax dev. with sheet film.

    Metod

  8. #8

    Join Date
    Oct 2004
    Location
    S.W. Wyoming
    Posts
    1,137

    film...on film

    PhotoFlo can cause more problems than it solves if you use too much. Kodak's recommendation is way too much. Even with hard water, 3 or 4 drops in a quart of water will usually suffice. And don't get it on plastic reels.

Similar Threads

  1. Will a Grafmatic 4x5 Film Holder and Graphic Film Pack Adapters fit Zone VI
    By Robert Peterson in forum Cameras & Camera Accessories
    Replies: 4
    Last Post: 11-May-2004, 16:02
  2. Film development times for Kodak's new 320Tri-X sheet film?
    By Fred Ullrich in forum Darkroom: Film, Processing & Printing
    Replies: 1
    Last Post: 29-Dec-2003, 10:56
  3. 4x5 Film Holder needed with Fuji Quik-Stick film?
    By David Roy in forum Cameras & Camera Accessories
    Replies: 7
    Last Post: 9-Jul-2001, 20:33
  4. Polaroid Instant Film for Proofing & Fuji Film Choice
    By James Conrad in forum Darkroom: Film, Processing & Printing
    Replies: 8
    Last Post: 14-Jun-2001, 03:10
  5. Replies: 1
    Last Post: 3-Jul-2000, 18:35

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •