Ilford IIN-3 Chromium Intensifier

Ilford IIN-3 Chromium Intensifier

  1. Ian Grant

    Ian Grant Subscriber

    Messages:
    18,145
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    Ian Grant submitted a new resource:

    Ilford IIN-3 Chromium Intensifier - Ilford IIN-3 Chromium Intensifier

    Read more about this resource...
     
    Last edited by a moderator: Feb 6, 2016
  2. David Grenet

    David Grenet Member

    Messages:
    310
    Joined:
    Jan 29, 2007
    Location:
    Sydney, Aust
    Shooter:
    Multi Format
    Interesting. I saw you refer to this in the thread on thin negs - thanks for posting the formula!
     
  3. haryanto

    haryanto Member

    Messages:
    168
    Joined:
    May 2, 2005
    Shooter:
    4x5 Format
    Can I replaced potassium bichromate with potassium dichromate Ian? it's hard to find potassium bichromate in my country, thanks
     
  4. Ian Grant

    Ian Grant Subscriber

    Messages:
    18,145
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    Bi and Di just mean 2, Bichromate is just an alternative name for Dichromate, so no substitution is required as they are the same :D

    Ian
     
  5. haryanto

    haryanto Member

    Messages:
    168
    Joined:
    May 2, 2005
    Shooter:
    4x5 Format
    thanks Ian, it's clear now
     
  6. An Le-qun

    An Le-qun Member

    Messages:
    82
    Joined:
    Mar 6, 2008
    Shooter:
    4x5 Format
    Variation on haryanto's question, with preliminaries: I am running low on Potassium Dichromate, but I have loads of Ammonium Dichromate. Can I substitute one for the other?

    Also, are there any suitable substitutes for the H2SO4?
     
  7. Ian Grant

    Ian Grant Subscriber

    Messages:
    18,145
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    You can't add Ammonium compounds to HCl without having problems.

    There's no H2SO4 used in this intensifier.

    Ian
     
  8. eclarke

    eclarke Member

    Messages:
    1,972
    Joined:
    Jun 11, 2004
    Location:
    New Berlin,
    Shooter:
    ULarge Format
    Ian, does the bleaching time vary much with different emulsions? I've tried persulfate bleaching on Tmax100, for instance, and it seems to have almost zero effect and on FP4 it's really quick..Thanks..Evan Clarke
     
  9. Ian Grant

    Ian Grant Subscriber

    Messages:
    18,145
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    Yes there can be variations, it's sometimes quite noticeable, there's just too many variables try all combinations and Persulphates not as strong. The reason for the Dichromate bleach is critical because it stains as well as bleaches.

    Ian
     
  10. eclarke

    eclarke Member

    Messages:
    1,972
    Joined:
    Jun 11, 2004
    Location:
    New Berlin,
    Shooter:
    ULarge Format
    Thanks Ian, It's sort of funny, I got on to this persulfate thing and decided I would give it a whirl. The first neg was Tmax 100 and I used a little white tray on a light table so I could watch it. I watched and watched and watched, almost zero effect. I made another batch and tried an FP4 neg, ready to watch it too and it literally disappeared before I could snatch it from the tray!!! I had to think about that for a while before I went back to the well...EC
     
  11. An Le-qun

    An Le-qun Member

    Messages:
    82
    Joined:
    Mar 6, 2008
    Shooter:
    4x5 Format
    Oops! I just made a substitution of my own! No wonder I have such problems in the lab.
    Let's try this again.... Any suitable substitutes for HCl?
     
  12. haryanto

    haryanto Member

    Messages:
    168
    Joined:
    May 2, 2005
    Shooter:
    4x5 Format
    i've try it, it seem dont like selenium which intensifier negative and raise contrast,
    Ilford IIN-3 Chromium Intensifier very good for underdeveloped negative and intensifier it in all range density so contrast just litlle rise, hardening is a must otherwise it's easily scracth
    thanks Ian, very usefull