The Most Simple Lith Developer - Wall's Normal Hydroquinone

Discussion in 'B&W: Film, Paper, Chemistry' started by dancqu, Nov 27, 2004.

  1. dancqu

    dancqu Member

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    With out any intention to do so I compounded a Lith developer a
    few months ago. Since then I've off and on been looking for a formula
    similar to that which I compounded.

    Wall's Normal Hydroquinone comes closest. It is a two part developer.
    A solution; 100 grams S. Sulfite, 20 grams Hydroquinone, H2O to make
    one liter. B solution; 120 grams K. Carbonate, H2O to make one liter.
    A little less S. Carbonate will equal the K. Carbonate.

    Super Simple! I'll be comparing Wall's to my own. Has anyone used
    Wall's? It's a No-Brainer for Lith interested sorts. Dan
     
  2. Andre R. de Avillez

    Andre R. de Avillez Member

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    Quick question from a non-lith person:

    Do you mix the two parts or do you soak the paper in bath A and then drop it in bath B?
     
  3. glbeas

    glbeas Member

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    You mix the two prior to the printing session. Mixed it goes bad in a day, apart they last a long time, so you make a two part out of it.
     
  4. dancqu

    dancqu Member

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    The A and B are to be mixed just prior to use. Use once and
    discard.The formula seen in my OP should be good for 10 to 20 liters
    of working solution. Dilute 1:1:8 or as much as 1:1:18 then play
    with it some. Lith printing is very interesting and allows a lot
    of contrast control. Dan
     
  5. psvensson

    psvensson Member

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    I recently came upon a
    post by Patrick Gainer on photo.net that included this note:

    You can make a fairly good lith developer with 1/2 tbs sodium ascorbate, 1 tsp potassium bromide and 10 grams of lye in 500 ml of water. It doesn't last long, but neither does the hydroquinone version with sulfite.​

    Hope to try it one of these days...
     
  6. dancqu

    dancqu Member

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    I doubt that. The above formula is the one and only S. ascorbate Lith
    formula I've encountered; high contrast developer perhaps. Hydroquinone
    will, without regeneration, develop infectiously. That's the
    reason for a low sulfite level.

    I don't consider ascorbic acid a developing agent. P. Gainer says as
    much pointing out that when used alone the ph must be about 12;
    might make it with TSP. I think it better considered as a sulfite
    or hydroquinone substitute for it's ability to regenerate.

    Super-additive combinations are actually, I believe, nothing more
    than more or less regenerative combinations. Dan
     
  7. psvensson

    psvensson Member

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    Gainer speculates in his article on ascorbate in Rodinal that ascorbate inhibits infectious development, so you may be right in that it won't do true lith development.
     
  8. dancqu

    dancqu Member

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    Dr. Gudzinowicz has stated that only hydroquinone and it's derivatives
    will infectiously develop; produce a lith result.

    With very low sulfite levels HQ becomes semiquinone and then
    quinone. The last reacts with HQ to produce two semi Qs. So it's
    2, 4, 8, 16, 32, 64, etc. and explosive development insues. Semi
    Q is a strong developing agent in itself. Dan