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  1. #1

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    examples of emulsion making

    Here are prints made from two plates made using the washed emulsion fomula except I did wash, shread and filter the emulsion.

    The emulsion will be gritty and not adheer well to the plate if not washed and filtered.
    Attached Thumbnails Attached Thumbnails kevbridge.jpg  
    Last edited by kevin klein; 07-23-2007 at 04:38 PM. Click to view previous post history. Reason: additional image

  2. #2
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    Kevin;

    Congratulations. Very nice.

    Do you have an estimate of the speed?

    PE

  3. #3

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    lost image

    Could not get both images in one posting. Here is the other.
    Attached Thumbnails Attached Thumbnails kevtrain.jpg  

  4. #4

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    emulsion speed

    The speed of emulsion is 1.5. Exposure was 6 sec, f:45.
    I used 1 mil of .02 hypo solution to 10 gm of photo gel.

    I added all the silver at once. Next time I am going to add silver much more slowley to see if the contrast will be a little less and faster speed. I prefer the slower speed for ease in handling in safe light with out the danger of fogging the plate and also because I use the cameras for wetplate so the lenscap can be used rather than a shutter.

  5. #5
    ben-s's Avatar
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    Fantastic! They look really good.
    How did you coat the plates?

    Thanks for keeping us updated with you experiments.
    Lens caps and cable releases can become invisible at will. :D

  6. #6
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    As you slow the silver nitrate addition, contrast goes down and speed goes up, so your change should do as you say.

    The hypo addition should be based on silver, not gelatin and the amount as well as the hold temperature must be determined by trial and error. I use 100 mg of sodium hypo pentahydrate per mole of silver and hold 1 hour at 60 C. I see a big gain in speed and contrast.

    PE

  7. #7

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    Amazing.

    Now there will be a run on plate holders for LF cameras!

  8. #8

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    Wow!
    Cheers,
    Clarence

  9. #9
    David A. Goldfarb's Avatar
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    That's a fantastic result. Tweak the contrast, and you're there.

    Just how contrasty are they? Are we looking at print scans, and if so, on what paper? Or are these neg scans, and do you know what the density range of the negs is?
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  10. #10

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    wow is right, makes me want to try some day!

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