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  1. #1

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    Question about Rodinal Special (Studional) for TRI-X

    Hello guys,

    i've started to develop b&w film since 4 years, in particular in the medium format, and I enjoy to print in darkroom when I find some spare time.


    In order to standardize my process, I've used only 2 film-developer combination:


    Ilford FP4 @ 80 in Rodinal 1+50 (13 min)
    Kodak TRI-X @ 250 in HC110 1+63 (10 min)

    and I'm satisfied.... but I'm a fan of Rodinal, so I've just bought a bottle of R09 Special (Studional) and I'd like to try with the TRI-X film


    On the R09 Special datasheet I've found: TRI-X 400 1+15 3,5 min

    Since this developing time is too short to manage, I would start with a higher diluition (1+30); what developing time do you suggest?
    6 min - 7 min?

    Does anyone experienced Tri-x in Rodinal Special?


    Thank you for your suggestion and your tecnhical support.


    Thomas from Italy (Bologna)

  2. #2

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    H

    Rodinal Special was an Agfa developer but it is not a paraaminophenol developer llke Rodinal, it is a PQ like Microphen.
    Never used it myself, but
    http://www.rangefinderforum.com/foru.../t-114527.html

    Noel

  3. #3

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    +1 ^^
    Rodinal and Rodinal Special have no much in common.

  4. #4

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    I know that Rodinal and Rodinal Special are very different developer, in fact I will to continue to use Rodinal on Ilford FP4 because I reached satisfing result with them; I'd like to try Rodinal Special only with TRI-X because it seems to be suited for medium speed film and should show less grain than the Rodinal.

  5. #5

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    Hi

    Yes it is likely to show less grain but a similar foot speed.
    But you need to be more careful with shelf life like a year rather than decades, or rather whatever it says on bottle..
    And I don't know how all the PQs react to dilution beyond 1:3, apart from some working well at 1:30.
    There is an old Agfa data sheet somewhere on the web...

    Noel

  6. #6

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    Studional is essentially a standard PQ developer. However it uses triethanolamine as the alkali instead of an alkali such as sodium metaborate. The presence of TEA should result in finer grain since it is also a silver halide solvent.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  7. #7

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  8. #8
    thefizz's Avatar
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    I use Studional with Tri-X at 1:30 for 8 minutes with agitation every minute. Works well but I have not yet done my film speed and development tests for this combination so it may change.
    www.thephotoshop.ie
    www.monochromemeath.com

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

  9. #9

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    @ xmas: thanks for the complete datasheet


    @thefizz: i feel that 1+30 for 8 min is on the long side; your negatives should show high contrast which is useful for scanning but difficult to manage in the wet-darkroom. Consider that, according to Agfa, the devoloping time of 3,5 min at 1+15 should deliver a 0.65 gamma index (high level of contrast if you print in darkroom).
    Last edited by Rodinalforever; 04-29-2015 at 02:39 AM. Click to view previous post history.

  10. #10
    thefizz's Avatar
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    Not very high at all, print easily.
    www.thephotoshop.ie
    www.monochromemeath.com

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

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