Technidol - any formula available?

Discussion in 'B&W: Film, Paper, Chemistry' started by John Bartley, Nov 21, 2005.

  1. John Bartley

    John Bartley Member

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    I guess the title says it all - I've searched both the web in general and the Kodak website to no avail.

    cheers and thank you
     
  2. jim appleyard

    jim appleyard Member

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    You probably won't find one, but if you have a copy of Anchell's "Darkroom Cookbook", there are other low-contrast dev formulas in there.

    Some folks are doing TechPan (if this is what you're after) in Rodinal at very high dilutions, something like 1+100 or 1+200. A search here may tell more.
     
  3. colrehogan

    colrehogan Member

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    Photographer's Formulary has something that is supposed to be similar to Technidol.
     
  4. John Bartley

    John Bartley Member

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    Thank you for the replies folks - I was kind of afraid that it might not be available as a recipe. I was able to find the MSDS for it, so now I need to research just what the contents list means.

    cheers and thank you again
     
  5. Gerald Koch

    Gerald Koch Member

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    Search the web for the following developers: Burton, Collins, Delagi, HFD-301, H&W Control, Perfection XR-1, POTA, SD-2415, T/O XDR-4, TDLC-3.

    Developers for Tech Pan or microfilm use either very dilute solutions or a Phenidone only based developer.
     
  6. Tom Hoskinson

    Tom Hoskinson Member

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    I agree with Gerald and I've personally had the best results With Techpan developed in Perfection XR1. Looks to me like H&W Conrol should work well also. I've been intending to cook some up and try it out.
     
  7. Tom Hoskinson

    Tom Hoskinson Member

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    John, according to Kodak's MSDS technidol is a phenidone/hydroquinone (i.e. PQ)developer that uses DIETHYLENE GLYCOL as the solvent. H&W Control is also a PQ developer. A public domain H&W recipe is available on the internet:

    H&W Solution A:
    Water 50 ml*
    Sodium sulfite 1 g
    Hydroquinone 0.16 g
    Sodium carbonate 4.6 g
    Phenidone 1.1 g
    H&W Solution B
    Water 50 ml*
    Sodium sulfite 8 g
    Add Solution A to Solution B, then add water to make 132 ml of concentrate.
    Phenidone dissolves with difficulty. Use water at approximately 55° (approximately 130°F). Mix the chemicals in the order shown, and be sure each is completely dissolved before adding the next.
    This is a concentrate. To use, add water to make to 2.1 litres of working solution. Process at normal development temperatures with intermittent agitation for 14 to 18 minutes.*

    Use with Bluefire Police, Agfa and Fuji microfilms, and Kodak Technical Pan. Gives unacceptably flat images on ordinary films.*

    Shelf life is approximately six months in a full, tightly capped glass or PET bottle, less than one week in a partly full bottle. Refrigeration prolongs shelf life.

    I've formulated a TEA (Triethanolamine version of H&W Control which I will be trying out) I'll post my recipe and the results.
     
  8. John Bartley

    John Bartley Member

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    Thank you Gerald and Tom. I did the search for XR1 and the contents "seem" to be a close match (this coming from a non-chemist = me :smile:) for the contents listed in the Kodak Technidol msds as Tom has already said. . This may seem a bit silly, but seeing as I have 60 ($cheap) rolls of this stuff, I'm going to dilute some D23 and try it - nothing to lose eh? If it doesn't work, I'll mix the XR1 and do the next roll in it.

    cheers
     
  9. df cardwell

    df cardwell Subscriber

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    You can get good results with FX-39. Here is a curve from Foto Import ( that is pretty much what I've obtained ) Reducing the agitation from 5 seconds twice per minute, and extending the development time, lowers the gamma above .9, but as it is, it's quite a nice answer for that finicky film.

    .
     
  10. dancqu

    dancqu Member

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    I've put a few rolls of 120 through a 1 gram metol
    1% sulfite by volume brew. At the time the volume
    was 375ml. Were I to repeat those trials I would
    use 500ml. I now use a two reel Kindermann for
    a roll. On a liter basis the formula is 2 grams
    metol and 10 grams sulfite. Consider it a
    low sulfite D23.

    I liked the results with Tech. Pan. I did not
    continue with the trials. Tech. Pan went to
    $7 plus a roll and I quit buying. Dan
     
  11. Alan Johnson

    Alan Johnson Subscriber

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    I hope to find a microfilm developer to mix as the commercial ones giving good speed are quite expensive.
    The H&W control formula posted above seems rather concentrated. I wonder if it would be OK to dissolve the phenidone in isopropyl alcohol and make the concentrate less concentrated.
     
  12. Tom Hoskinson

    Tom Hoskinson Member

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    Yes Alan, you can dissolve the phenidone in isopropyl alcohol or in one of the glycols. I find that stock solutions of phenidone dissolved in propylene gycol keep for a very long time (years).