Acros and Tanning Developers

Discussion in 'B&W: Film, Paper, Chemistry' started by Gareth Lock, May 21, 2003.

  1. Gareth Lock

    Gareth Lock Member

    Messages:
    1
    Joined:
    May 21, 2003
    I am currently undertaking a photo course during which we have been using Acros film as the main medium and developing it in either a 2 bath staining or Pyro Cat.

    However, one of the other tutors I know is very much against using staining/tanning developers with Acros as they may damage the emulsion.

    I have alot of respect for both tutors and so don't want to start a 'He said this, but he said this....type argument'.

    I am therefore looking for some guidance, and preferably documented evidence, to allow me to make an informed choice - and live with it!

    Many Thanks for your anticipated help in this matter.

    Gareth
     
  2. Thomassauerwein

    Thomassauerwein Member

    Messages:
    1,627
    Joined:
    Apr 20, 2003
    Location:
    Southern Cal
    Shooter:
    Large Format
    If you can shoot several peices of film of the same subject and then process some film in each situation. then print and present your case as a comparison, then decide which acheives the best results based on your needs.
     
  3. Donald Miller

    Donald Miller Member

    Messages:
    6,242
    Joined:
    Dec 21, 2002
    Shooter:
    Large Format
    I agree with the previous post. Sounds like you have two instructors that need to come to an agreement. The proof of whether it harms the emulsion or not is in the results and not someone's ill researched opinion.
     
  4. Jorge

    Jorge Inactive

    Messages:
    4,532
    Joined:
    Sep 6, 2002
    Shooter:
    Large Format
    I have used ACROS 8x10 in ABC and Pyrocat HD and have not seen any damage done to the emulsion. Perhaps you might want to ask him where he got his information. Most of te staining developers contain fairly common developing ingredients aside from pyrogallol, or pyrocatechin. I really doubt any of these two would "damage" the emulsion as they also hardening in addition to staining developing ingredients.
     
  5. roy

    roy Member

    Messages:
    1,308
    Joined:
    Sep 7, 2002
    Location:
    West Sussex
    Shooter:
    Medium Format
    I recently asked a question about Acros and Pyro effectiveness and developing times. None of the replies suggested the combination was bad.
     
  6. sanking

    sanking Member

    Messages:
    4,813
    Joined:
    Mar 26, 2003
    Location:
    Greenville,
    Shooter:
    Large Format
    If I were you I would ask the instructor to explain the mechanism by which a staining developer harms the emulsion of the film, or the authority on which he/she bases this opinion.

    Most staining developers (and this includes PMK, ABC, Rollo Pyro, Diaxactol and Pyrocat-HD) tan as well as stain, and the tanning actually hardens the emulsion as the film is developed, making it less susceptible to damage from scratching or tearing away from the base during the final stages of processing. In other words, films developed in staining /tanning developers are actually less likely to emulsion damge than films developed in traditional developers.

    I think your instructor just got it backward.

    Sandy King
     
  7. Aggie

    Aggie Member

    Messages:
    4,925
    Joined:
    Jan 1, 2003
    Location:
    So. Utah
    Shooter:
    Multi Format
    ..
     
  8. Tom Duffy

    Tom Duffy Member

    Messages:
    963
    Joined:
    Nov 13, 2002
    Location:
    New Jersey
    I've used rollo pyro fairly extensively with Acros in a Jobo processor. I far as I can tell the emulsion suffered no damage.
     
  9. Jorge

    Jorge Inactive

    Messages:
    4,532
    Joined:
    Sep 6, 2002
    Shooter:
    Large Format
    I just developed my last 4 sheets of ACROS and they were all fine.....I have never heard of this form another people either.
     
  10. avandesande

    avandesande Member

    Messages:
    1,246
    Joined:
    Sep 7, 2002
    Location:
    Tijeras, NM
    Shooter:
    Medium Format
    Jorge, how far can ACROS films be pushed? I have thought about trying it but it is very expensive.
    --Aaron
     
  11. Jorge

    Jorge Inactive

    Messages:
    4,532
    Joined:
    Sep 6, 2002
    Shooter:
    Large Format
    I would say n+2 is easy to get, but no more. You start getting very high b+f. I have calibrated by the BTZS method, but in zone speak a SBR of 6 is similar to a "n+2" situation. I gotta tell you, is a nice film but I did not see an advantage over TMX to spend the extra money on it. Reciprocity for TMX 400 is not bad, and I rarely shoot at more than 3 or 4 seconds, so the only advantage ACROS would have does not justify the extra expense. My experience, dont bother buying it.
     
  12. Tom Stanworth

    Tom Stanworth Member

    Messages:
    2,027
    Joined:
    Sep 4, 2003
    Shooter:
    Multi Format
    I am about to use Barry Thorntons Exactol Lux on it (finer grained version of DiXactol. The instructions state that Acros becomes very soft in this developer, so advises extra care. Sounds like if you treat your film with care (well, obviously who doesn't ?) you should be fine...

    Tom S