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  1. #1
    Mustafa Umut Sarac's Avatar
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    Looking for Recipe of Gelatin mixed with distilled water Emulsion

    Gandolfi posted a wonderful image to the gallery he made with distilled water and gelatin mix. I never heard of such a emulsion and I dont know how it Works. Can anyone shed some light and give a such recipe. He did not answer to me may be he has no time...

    Thank you ,

    Umut

  2. #2
    Mustafa Umut Sarac's Avatar
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    the recipe is this:A:Gelatin (food gelatin) 20gPotassium bromide : 16gDistilled water 125mlAdd the gelatin to the water and allow to swell.Raise the temperature to 50deg. C (water jacket)Add the Potassium Bromide and stir to all is dissolved.B:Silver Nitrate: 20gDistilled water 125mlRaise the temperature of B to 40 degrees – go to the darkroom and mix the two solutions.Small quantities at a time while stirring.Finally filter it through a cotton wool or similar..Ready to use. hint (as am I am just an amateur):High contrast negativeOverexpose strong developer (I've use double strength as normal)Underexpose ( this is developer for about 15 sec...)AT LEAST two - maybe even three coatings to get blacks to be just that: black...

    Gandolfi responded at Gallery. Thank you Emil.

  3. #3
    gandolfi's Avatar
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    Mustafa

    Go look at my latest image submission: there are some more info..

    Quote Originally Posted by Mustafa Umut Sarac View Post
    the recipe is this:A:Gelatin (food gelatin) 20gPotassium bromide : 16gDistilled water 125mlAdd the gelatin to the water and allow to swell.Raise the temperature to 50deg. C (water jacket)Add the Potassium Bromide and stir to all is dissolved.B:Silver Nitrate: 20gDistilled water 125mlRaise the temperature of B to 40 degrees – go to the darkroom and mix the two solutions.Small quantities at a time while stirring.Finally filter it through a cotton wool or similar..Ready to use. hint (as am I am just an amateur):High contrast negativeOverexpose strong developer (I've use double strength as normal)Underexpose ( this is developer for about 15 sec...)AT LEAST two - maybe even three coatings to get blacks to be just that: black...

    Gandolfi responded at Gallery. Thank you Emil.

  4. #4
    TheToadMen's Avatar
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    Check out this book and website for more of this kind of procedures:
    http://www.alternativephotography.co...ting-processes
    "Have fun and catch that light beam!"
    Bert from Holland
    my blog: http://thetoadmen.blogspot.nl
    my Linkedin pinhole group: http://tinyurl.com/pinholegroup


    * I'm an analogue enthusiast, trying not to fall into the digital abyss.
    * My favorite cameras: Hasselblad SWC, Leica SL, Leica M7, Russian FKD 18x24, Bronica SQ-B and RF645, Rolleiflex T2, Nikon F4s, Agfa Clack and my pinhole cameras

  5. #5
    TheToadMen's Avatar
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    Quote Originally Posted by gandolfi View Post
    Mustafa

    Go look at my latest image submission: there are some more info..
    You mean this one?
    http://www.apug.org/gallery1/showima...atid=newimages

    You could also sensitize the paper with only gelatin first, before applying a light sensitive layers, to avoid the "liquid emulsion" sinking too deep into the paper.
    Last edited by TheToadMen; 07-26-2013 at 07:26 AM. Click to view previous post history.
    "Have fun and catch that light beam!"
    Bert from Holland
    my blog: http://thetoadmen.blogspot.nl
    my Linkedin pinhole group: http://tinyurl.com/pinholegroup


    * I'm an analogue enthusiast, trying not to fall into the digital abyss.
    * My favorite cameras: Hasselblad SWC, Leica SL, Leica M7, Russian FKD 18x24, Bronica SQ-B and RF645, Rolleiflex T2, Nikon F4s, Agfa Clack and my pinhole cameras

  6. #6
    Hexavalent's Avatar
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    Looks to be a very basic silver halide in gelatin emulsion.

    The 'instructions' aren't entirely clear: "go to the darkroom and mix the two solutions.Small quantities at a time while stirring." Slowly adding silver to the halide will produce a different result than adding halide to silver.

    With the high gelatin concentration given , there shouldn't be a need to size (pre-coat) the paper with gelatin unless it's VERY absorbent.
    - Ian



 

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