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Thread: Kodak TechPan

  1. #1

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    Kodak TechPan

    Years ago in a magazine I picked up a modified formula for developing TechPan. This mixture worked quite well, was quite simple to make and is as follows.

    Edwal FG-7 (normal mixture for selected film) + 1 35mm film can of sodium sulfite added to the solution.

    Now I am looking to repeat this type of simplicity but Edwal FG-7 is no longer available where I live.

    Would anybody like to take a shot at guessing what might be a suitable alternative for Edwal FG-7? Does anybody know what the ingredients were in FG-7?

    I am seeking an easy alternative to Technidol for taming the contrast of TechPan and yet want the developer to be easy to make and use as a one-shot.

    Thanks in advance for your suggestions.

    Kind Regards,
    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

  2. #2

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    G'Day (from 'Downunder') Greywolf,

    HFD-301 developer works well with Tech Pan (in 35mm & 120). It was formulated by Hans F Deitrich (Published in an article in Darkroom and Creative Camera Techniques - March 1992). The formula is:

    Sodium sulphite 70g
    Hydroquinone 2g
    Potassium bromide 1g
    Phenidone 2g
    Boric acid 2g
    Water to make 1000ml

    Speed rating is EI 25. Use as stock solution. He listed a dev time of 8 min at 20 deg C, but try times 6 or 6.5 min at 20 deg C. These are times I have used with good results. Developed in Jobo CPE2 - slow continuous rotation, or try 7 min for intermittent agitation. This developer has a long shelf life and the stock solution can be .."used over and over again.." (Hans F Deitrich).
    He recommends a stop bath of:

    Acetic acid (glacial 90%) 20ml
    Sodium sulphite 20g
    Water to make 1000ml
    (equivalent to 2% Sodium sulphite in 2% Acetic acid)

    Fix as per usual.

    He also recommended C-41 developer (developer only - don't put through a minilab machine!) at 10 min 20 deg C. This time the speed is at EI 50. Use stop bath as above and fix as normal.

    Cheers - Tony Russell

  3. #3

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    I would like to see more posts on developers for TP. Anyone has a good result using Rodinal, XTOL, HC110?

  4. #4
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    I took the liberty to cpy this into the recipes section

    Quote Originally Posted by Tmax
    G'Day (from 'Downunder') Greywolf,

    HFD-301 developer works well with Tech Pan (in 35mm & 120). It was formulated by Hans F Deitrich (Published in an article in Darkroom and Creative Camera Techniques - March 1992). The formula is:

    Sodium sulphite 70g
    Hydroquinone 2g
    Potassium bromide 1g
    Phenidone 2g
    Boric acid 2g
    Water to make 1000ml

    Speed rating is EI 25. Use as stock solution. He listed a dev time of 8 min at 20 deg C, but try times 6 or 6.5 min at 20 deg C. These are times I have used with good results. Developed in Jobo CPE2 - slow continuous rotation, or try 7 min for intermittent agitation. This developer has a long shelf life and the stock solution can be .."used over and over again.." (Hans F Deitrich).
    He recommends a stop bath of:

    Acetic acid (glacial 90%) 20ml
    Sodium sulphite 20g
    Water to make 1000ml
    (equivalent to 2% Sodium sulphite in 2% Acetic acid)

    Fix as per usual.

    He also recommended C-41 developer (developer only - don't put through a minilab machine!) at 10 min 20 deg C. This time the speed is at EI 50. Use stop bath as above and fix as normal.

    Cheers - Tony Russell
    Mama took my APX away.....

  5. #5

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    Quote Originally Posted by Tmax
    G'Day (from 'Downunder') Greywolf,

    HFD-301 developer works well with Tech Pan (in 35mm & 120). It was formulated by Hans F Deitrich (Published in an article in Darkroom and Creative Camera Techniques - March 1992). The formula is:

    Sodium sulphite 70g
    Hydroquinone 2g
    Potassium bromide 1g
    Phenidone 2g
    Boric acid 2g
    Water to make 1000ml

    Speed rating is EI 25. Use as stock solution. He listed a dev time of 8 min at 20 deg C, but try times 6 or 6.5 min at 20 deg C. These are times I have used with good results. Developed in Jobo CPE2 - slow continuous rotation, or try 7 min for intermittent agitation. This developer has a long shelf life and the stock solution can be .."used over and over again.." (Hans F Deitrich).
    He recommends a stop bath of:

    Acetic acid (glacial 90%) 20ml
    Sodium sulphite 20g
    Water to make 1000ml
    (equivalent to 2% Sodium sulphite in 2% Acetic acid)

    Fix as per usual.

    He also recommended C-41 developer (developer only - don't put through a minilab machine!) at 10 min 20 deg C. This time the speed is at EI 50. Use stop bath as above and fix as normal.

    Cheers - Tony Russell
    Tony,Are you sure about the 2 grams of Phenidone???

    That is a lot ot Phenidone! I would expect 0.2 to 0.3 grams per liter - not 2.0.

    Other than that (and the amount of Hydroquinone - 2 grams versus 6 grams), the Deitrich formulation is very similar to Crawley's FX-3 compensating developer.
    Tom Hoskinson
    ______________________________

    Everything is analog - even digital :D

  6. #6

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    Hi Jay,

    It would seem that you are rapidly becoming a bit of a [COLOR=Red]TEA[/COLOR] expert lately. As such I was hoping that you may be help to help me understand the ingredient.

    I see that at one supplier [COLOR=Red]TEA[/COLOR] is purchased as a solution while at another supplier [COLOR=Red]TEA[/COLOR] seems to come in powdered form. Am I wrong in this assumption?

    If not, then how might I convert the powder form into a solution?

    Thanks for the guidance.
    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

  7. #7
    gainer's Avatar
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    Quote Originally Posted by GreyWolf
    Hi Jay,

    It would seem that you are rapidly becoming a bit of a [COLOR=Red]TEA[/COLOR] expert lately. As such I was hoping that you may be help to help me understand the ingredient.

    I see that at one supplier [COLOR=Red]TEA[/COLOR] is purchased as a solution while at another supplier [COLOR=Red]TEA[/COLOR] seems to come in powdered form. Am I wrong in this assumption?

    If not, then how might I convert the powder form into a solution?

    Thanks for the guidance.
    Be sure you ask for triethanolamine. Tech grade will suffice. It is a liquid organic base. For practically all uses, it is not alkaline until you add water, but the stuff we want does not come in solid form unless they mean frozen. It freezes at about 70 F, but I don't think you could powder that.
    Gadget Gainer

  8. #8
    gainer's Avatar
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    Perhaps they are selling it by weight instead of fluid measure. I'm sure it is a liquid in either case. If it is solid when you get it, as might well be the case this time of the year, put it in a warm place until it thaws and keep it at aout 80 F or higher. I won't spoil. Above 90 F it may turn yellow, but no harm is done.
    Gadget Gainer

  9. #9
    Ian Grant's Avatar
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    can only comment:

    I tried 35mm TechPan a few years ago was impressed, then tried KB14 (35mm EFKE 25) and was totally amazed as fine grained but so much sharper.

    I did and still use TechPan in 5x4, but only for specialist uses, only half a box left though.

    Efke 25 has far beter tonal responses and is far easier to use.

  10. #10

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    Ian, my experience is similar to yours. I have 35mm, 120 roll and 4x5 in the freezer and rarely use it anymore. I also find Efke 25 to be easier to use (easy is relative!) with better tonal respose.
    Tom Hoskinson
    ______________________________

    Everything is analog - even digital :D

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