Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,814   Posts: 1,581,616   Online: 770
      
Results 1 to 7 of 7
  1. #1
    thefizz's Avatar
    Join Date
    Dec 2004
    Location
    Trim, Ireland.
    Shooter
    Medium Format
    Posts
    2,057
    Images
    39

    Streaking on Ortho Lith Film

    I was making some enlarged negs from 120 B&W positives on Ortho Lith film yesterday and kept getting streaking along the dark areas of the film. My procedure was to pre-wash the film for 1 minute and tray develop in Tanol staining developer for about 3 minutes with continuous agitation.

    As my agitation was mainly in one direction, I tried again by agitating in the other direction. The results were a lot better but on closer inspection I could still see slight streaking as per the new direction of agitation.

    So is it simply a matter of evenly agitating in both directions or is there any other reason for this problem?

    Peter
    www.thephotoshop.ie
    www.monochromemeath.com

    "you get your mouth off of my finger" Les McLean

  2. #2
    cliveh's Avatar
    Join Date
    Oct 2010
    Shooter
    35mm RF
    Posts
    3,658
    Images
    344
    Is there a reason why you are pre-washing the film and using a staining developer?

    “The contemplation of things as they are, without error or confusion, without substitution or imposture, is in itself a nobler thing than a whole harvest of invention”

    Francis Bacon

  3. #3
    thefizz's Avatar
    Join Date
    Dec 2004
    Location
    Trim, Ireland.
    Shooter
    Medium Format
    Posts
    2,057
    Images
    39
    Quote Originally Posted by cliveh View Post
    Is there a reason why you are pre-washing the film and using a staining developer?
    The pre-wash is to help even development and from researching the process pyro developers seem to be recommended to control contrast.
    www.thephotoshop.ie
    www.monochromemeath.com

    "you get your mouth off of my finger" Les McLean

  4. #4
    Jim Noel's Avatar
    Join Date
    Mar 2005
    Shooter
    Large Format
    Posts
    1,904
    Blog Entries
    1
    You say you reversed the direction of agitation and the streak is now in that direction. This says the problem is associated with your method of agitation. Agitation needs to be random, and not in a single direction.
    [FONT=Comic Sans MS]Films NOT Dead - Just getting fixed![/FONT]

  5. #5
    thefizz's Avatar
    Join Date
    Dec 2004
    Location
    Trim, Ireland.
    Shooter
    Medium Format
    Posts
    2,057
    Images
    39
    Yes that's what it looks like but I just wanted to be sure there was no other reason as it didn't happen when I used paper developer.

    Next time I'll gently agitate in all directions.
    www.thephotoshop.ie
    www.monochromemeath.com

    "you get your mouth off of my finger" Les McLean

  6. #6
    cliveh's Avatar
    Join Date
    Oct 2010
    Shooter
    35mm RF
    Posts
    3,658
    Images
    344
    Quote Originally Posted by thefizz View Post
    The pre-wash is to help even development
    Well perhaps it doesn't.

    “The contemplation of things as they are, without error or confusion, without substitution or imposture, is in itself a nobler thing than a whole harvest of invention”

    Francis Bacon

  7. #7
    thefizz's Avatar
    Join Date
    Dec 2004
    Location
    Trim, Ireland.
    Shooter
    Medium Format
    Posts
    2,057
    Images
    39
    Quote Originally Posted by cliveh View Post
    Well perhaps it doesn't.
    It works, I was getting uneven development also until I introduced the pre-wash.
    www.thephotoshop.ie
    www.monochromemeath.com

    "you get your mouth off of my finger" Les McLean



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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