Salt-Free Salt Print Toned with Himalayan Black Salt

Discussion in 'Hand Coated Wet Prints' started by nmp, Nov 19, 2017.

  1. nmp

    nmp Member

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    Hi, everyone:

    As the title suggests I finally have something to share on my salt-free salt-print process. In the end, after going in circles a bit and struggling with my new printer to get a decent digital negative, I figured it was best to make a baseline process down from which modifications/improvements can be made later.

    For background please look at the following threads:

    https://www.photrio.com/forum/threads/salt-printing-dark-stain.147621/
    https://www.photrio.com/forum/threa...t-makes-a-terrific-toner.148338/#post-1941999

    The basic process is really simple.

    Materials:

    Substrate: Arches Aquarelle Bright White Cold Press.
    Negative: Digital Negative, Epson SC-400, Fixxons Transparency Foil
    Sensitizer: 10% Silver Nitrate
    Rinses: Distilled Water, 0.5% Salt (Sodium Chloride) Solution
    Fixer: 15% Sodium Thiosulfate + 0.2% Sodium Carbonate
    Hypo Clear: 2% Sodiul Sulfate + 0.2% Sodium Metabisulfate
    Toner: 0.5% Himalayan Black Salt

    Process:
    1. Rod coat sensitizer, dry 1 hour at room temperature in toaster oven with convection fan turned on.
    2. Expose in homemade UV box using BLB florescent bulbs, 30 min
    3. Distilled water rinse, 2.5 min x 2.
    4. Salt solution rinse, 5 min.
    5. Fix, 5 min.
    6. Tap water rinse, 2 min
    7. Hypo clear, 5 min
    8. Wash, 1 hour
    9. Tone, 6 mins
    10. Wash, ½ hour.
    11. Dry.
    Attached is the first and only full image I printed with this process:

    2017-11-18-0001_LQ.jpg


    :Niranjan.
     
    Last edited: Nov 20, 2017
  2. NedL

    NedL Subscriber

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    Somehow I completely missed this thread and never would have seen it if you hadn't mentioned it on the alt-photo listserve today.
    Well done!
     
  3. OP
    OP
    nmp

    nmp Member

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    Thanks, Ned. I think I might have put this post in the wrong place. Should have used the Alternative Processes forum, although the mention of digital negatives might have been a problem there.

    :Niranjan.
     
  4. Peter Schrager

    Peter Schrager Subscriber

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    Looks very nice!@
     
  5. OP
    OP
    nmp

    nmp Member

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    Thanks Peter. It seems I need to work a bit to improve my coating/drying process. The sensitizer seems to travel deeper into the paper making it difficult to be cleared out as can be seen from the darker stains in the lower portion of the white border as well as on the step wedge. Perhaps getting the viscosity up by using higher silver nitrate from 10% to 12% or even 15% might help. May be there are some inert additives I can use to the same effect. PVOH or fumed silica come to mind. I wonder if anyone has used those in the sensitizer solution. Those might help in bumping up the Dmax as well. It's decent right now but could be better.

    All that and more for the version 2.0...

    :Niranjan
     
  6. ced

    ced Member

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    Have you tried sizing the paper? Nice print!
     
  7. OP
    OP
    nmp

    nmp Member

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    Not yet. That is certainly an option worth considering if none of the other simpler remedies work, being that it is an additional step.
     
  8. RalphLambrecht

    RalphLambrecht Subscriber

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    is there a formula foe sulphide toning coming out of this thread?
     
  9. OP
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    nmp

    nmp Member

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    Hi, Ralph: The formula used in this work is simply 0.5% solution of the Black Salt (Kala Namak) in distilled (probably not required) water. I didn't try adding Na carbonate or Na sulfite etc that are normally a part of direct sulfide toners. That is something that can be played around with as a second order experimentation to see their effect on toning rates as well as bleaching tendency.

    :Niranjan.
     
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