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  1. #11

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    Assuming you have decent graduated equipment(or volumetric equipment), you could probably do it with 1mL of emulsion dilution in a solution of the complexing agent, basically you're using the color densiometer as a primitive spectroscopy machine, the theory would be that you set it to the color channel opposite that which the complex is, IE. blue if it's orange, green if it's red, and so on and so forth. I can see that it is fairly destructive, however if you only measure your emulsion a few times during production, it's probably not destructive enough to worry about.

    Ben

  2. #12
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    Ben;

    Out of a 400 gram make, I could use 40 grams or 10% on the test. Using a meter with appropriate electrodes, there is no loss whatsoever.

    PE

  3. #13

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    Ah, well that's a much easier method, I didn't know there was such an easy method! I'm just up in buffalo, so let me know if you need anything to make your meter.

    Ben

    P.S.: I wonder how much it would be to try one of your paper emulsions, before I start making my own, it'd be nice to someone elses made emulsion and compare it to commercial ones, I'd be willing to pay, of course.

  4. #14
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    I can make you some. It costs me for Silver, heat, water and gelatin mainly. Lets tall off-line.

    As for the meter, I need two pieces of silver wire right now, about 99% fine and about 6" long each.

    I've been thinking of a jewelry hobby store or something.

    Thanks.

    PE

  5. #15

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    Ben, I've got a meter, I just need an electrode. Actually, I just need a good reference electrode. As PE says, one can use a billet of silver for one half-cell.

    PE - try this: 99.99% round wire -
    http://www.ccsilver.com/silver/superfines.html#four
    12 or 14 gauge should be good. You want to split an order?
    Kirk

    For up from the ashes, up from the ashes, grow the roses of success!

  6. #16

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    Here's some really useful info on Ag-AgCl reference electrodes:
    http://www.consultrsr.com/resources/ref/agcl.htm
    Kirk

    For up from the ashes, up from the ashes, grow the roses of success!

  7. #17

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    Quote Originally Posted by Photo Engineer View Post
    My emulsion is about 1 micron...
    PE
    Which one are you referring to?
    The pure chloride paper one or the "ISO 40" one ?

  8. #18
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    Quote Originally Posted by Ray Rogers View Post
    Which one are you referring to?
    The pure chloride paper one or the "ISO 40" one ?

    ISO 40 SRAD. Picture posted here in another thread.

    PE

  9. #19
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    Quote Originally Posted by Kirk Keyes View Post
    Here's some really useful info on Ag-AgCl reference electrodes:
    http://www.consultrsr.com/resources/ref/agcl.htm
    Which will not work with anything but AgCl emulsions I would think.

    PE

  10. #20

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    Quote Originally Posted by Photo Engineer View Post
    As for the meter, I need two pieces of silver wire right now, about 99% fine and about 6" long each.
    PE
    Why do you need 2 ?

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