Looking for Recipe of Gelatin mixed with distilled water Emulsion

Discussion in 'Alternative Processes' started by Mustafa Umut Sarac, Jul 25, 2013.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    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. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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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. gandolfi

    gandolfi Member

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    Mustafa

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

     
  4. TheToadMen

    TheToadMen Subscriber

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  5. TheToadMen

    TheToadMen Subscriber

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    You mean this one?
    http://www.apug.org/gallery1/showimage.php?i=73117&catid=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 a moderator: Jul 26, 2013
  6. Hexavalent

    Hexavalent Subscriber

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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.