Forte Polywarmtone Paper Speeds

Discussion in 'B&W: Film, Paper, Chemistry' started by rshepard, Jan 15, 2008.

  1. rshepard

    rshepard Member

    Messages:
    167
    Joined:
    Jun 11, 2005
    Location:
    Troutdale, O
    Shooter:
    Medium Format
    I was just given a couple of opened 25-sheet packs of Forte Polywarmtone FB paper (one is Elegance PWT Art with an ivory finish, the other PWT with a glossy finish). To maximize their use in printing negatives I need to know the ISO speed of these papers. If you know what those speeds are, or have a reference to where I can find them, please let me know.

    If such data are not available, I'll need to determine the speeds myself; probably with cut sheets to conserve paper.

    TIA,

    Rich
     
  2. ath

    ath Member

    Messages:
    889
    Joined:
    Aug 29, 2006
    Location:
    Germany
    Shooter:
    35mm
    You can take the values from the ADOX Polywarmtone, it is the same paper.
    However, I'm under the impression, that these values are not very correct. Polywamtone is roughly 4 times (2 stops) slower compared to Ilford MG IV or Agfa MCP.
     
    Last edited by a moderator: Jan 15, 2008
  3. naaldvoerder

    naaldvoerder Member

    Messages:
    655
    Joined:
    Apr 4, 2004
    Shooter:
    35mm
    Is this helpfull?


    ILFORD filters
    Parameters without 00 0 1 2 3 4 5
    R 100 150 130 110 90 80 70 60
    P 160 50 50 50 50 40 25 25

    KODAK filters
    Parameters without -1 0 1 2 3 4 5
    R 100 140 120 110 100 90 70 60
    P 160 100 100 100 100 80 25 25

    DURST color enlarger head
    Parameters without 150Y 100Y 30Y 20M 50M 100M 150M
    R 100 150 130 100 90 80 70 70
    P 160 50 64 100 100 80 64 50

    Saved from Forte's website

    Jaap jan
     
  4. rshepard

    rshepard Member

    Messages:
    167
    Joined:
    Jun 11, 2005
    Location:
    Troutdale, O
    Shooter:
    Medium Format
    Thank you Andreas and Jan.

    When I searched the Web with Google for the paper speed the Forte website did not show up. Since I have a color head on my Beseler enlarger, I can convert the Durst values.

    Much appreciated,

    Rich
     
  5. bdial

    bdial Subscriber

    Messages:
    5,434
    Joined:
    Jan 2, 2005
    Location:
    NE U.S.
    Shooter:
    Multi Format
    If the packages are sealed, there should be a datasheet. If not, I could send you a scan if you want. Let me know.
     
  6. Bruce Osgood

    Bruce Osgood Membership Council Council

    Messages:
    2,612
    Joined:
    Sep 9, 2002
    Location:
    Brooklyn, N.Y.
    Shooter:
    Multi Format
    I have the poop sheet from a box of Polygrade V Elegance Fiber Based Paper that says the papers ISO speed is 400 without filtration.
     
  7. ann

    ann Subscriber

    Messages:
    2,920
    Joined:
    Sep 10, 2002
    Shooter:
    35mm
    the polywarmtone is 160 if i remember correctly. the paper Bruce is talking about is not the same paper.
     
  8. rshepard

    rshepard Member

    Messages:
    167
    Joined:
    Jun 11, 2005
    Location:
    Troutdale, O
    Shooter:
    Medium Format
    Thank you. That would be handy to have. I'll give you my email address in a private message so it's not too available for spammers.

    Rich
     
  9. rshepard

    rshepard Member

    Messages:
    167
    Joined:
    Jun 11, 2005
    Location:
    Troutdale, O
    Shooter:
    Medium Format
    Ann,

    That's in line with the first two replies. Thank you very much.

    Rich
     
  10. Ray Heath

    Ray Heath Member

    Messages:
    1,020
    Joined:
    Dec 29, 2005
    Location:
    Eastern, Aus
    Shooter:
    Multi Format
    g'day Rich

    how is it useful to know the ISO of printing paper?

    Ray
     
  11. bdial

    bdial Subscriber

    Messages:
    5,434
    Joined:
    Jan 2, 2005
    Location:
    NE U.S.
    Shooter:
    Multi Format
    It's useful when you're switching from other papers and looking get an equivalent exposure. For me, all of my contacts are on Ilford, but I may or may not choose Ilford for a printing session.
    Here is the data sheet. If you have problems reading it, pm me with an email, and I can send a better version.
     

    Attached Files: