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Thread: monobaths

  1. #11
    RalphLambrecht's Avatar
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    please do. i don't have access to this book, just have 'modern photographic processing by haist 1 zzz72
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    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  2. #12

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    Why not red plastic or acrlyic tank? If the red coloring was a strong enough filter you could basically develop your paper in daylight!

  3. #13
    RalphLambrecht's Avatar
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    i think, i'll be using an opaque platic, but yes, a daylight tank.
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    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  4. #14

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    Haist devotes an entire chapter to monobaths for papers and gives several formulas. I picked the following one since it contains no exotic ingredients. It was designed for machine processing where the paper is not agitated in the solution for the first 45 sec to insure good contrast and blacks. Then the paper is agitated constantly for 15 sec to insure proper fixing, after which it is washed. It seems this can be easily done without resorting to a machine. As with all monobaths some tinkering may be needed with the formula for the particular paper used.

    Roman Monobath For Papers

    Sodium carbonate 30 g
    Sodium sulfite 20 g
    Ascorbic acid 10 g
    Phenidone 1g
    Potassium bromide 1 g
    Sodium thiosulfate25 g
    5-Phenyl-1-mercaptotetrazole 0.05 g
    Water to make 1l

    R. A. Roman, U. S. Pat. 110,595 (1963)
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

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  5. #15
    RalphLambrecht's Avatar
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    thank you gerald,
    where in haist did you find this, my reading is limited due to bad vision on the left eye. i did not find this in the index under monobath.
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  6. #16
    David A. Goldfarb's Avatar
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    And who sells 5-Phenyl-1-mercaptotetrazole, and what does it do in such a small quantity?
    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

  7. #17

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    Quote Originally Posted by David A. Goldfarb View Post
    And who sells 5-Phenyl-1-mercaptotetrazole, and what does it do in such a small quantity?
    It's a restrainer and is probably used to adjust image tone. I would first try Eastman Chamical Co.
    Last edited by Gerald C Koch; 12-21-2012 at 06:54 PM. Click to view previous post history.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  8. #18

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    Before Haist published his two books on photographic chemistry he wrote a book called The Monobath Manual. The formula appears in Chapt 6. A used copy is usually available from places like Amazon for around $10.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  9. #19
    RalphLambrecht's Avatar
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    i just ordered a cpy for $25., which is greatunfortunately,i'll have to wait until next year to receive it,but still, thanks so much for the lead!
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  10. #20
    RalphLambrecht's Avatar
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    could one use trion 100 instead?
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

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