Chemicals alternative process

Discussion in 'Darkroom Developing and Printing' started by Albane, Jul 22, 2004.

  1. Albane

    Albane Guest

    Please, could someone help in this ?
    Thanks.
    ----------------------------
    Theme : identification of chemical products alternative techniques.

    Description of the quiz I have to solve:

    Sheets have already been impressed (they contain the latent image and
    are steel white). We work with a very few daylight. The room must be
    dark but not completely. No artificial lighting.

    1. Sheets are sucessively imbibed with two products:
    The first one is brown liquid with a medium smell, I think often used in
    photography. Sheets are imbebed with this frist product.
    The second product used is transparent like water but is very odorous
    (when you smell it, it is very aggressive). That looks like ammonia very
    concentrated. Maybe a stop bath.
    When imbibed with this second product, in the darkroom, the prints
    become black (like dirty or bad photocopies).
    According to you, what are these two products?

    I made the two first steps and now I cannot remove this dirty black veil
    on the sheets. How could I do?

    I saw a demonstration during the said workshop, this is how it was done
    to remove the black veil:

    2. In order to clean this black veil, a product which is sometimes under
    powder of green-blue-grey colour or a blue translucent gel (like a
    shampoo) is used, mixed with lukewarm water. We still work in the dark.

    When this powder or gel is introduced into water and mixed, water
    becomes light blue and makes a soapy water with moss. Prints are now
    introduced in this bath and have to stay some minutes, agitated
    moderately. When withdrawn, prints show now their visible image, covered
    with a slight blue-grey veil. We wash under water.

    According to your experience, what could be this product?

    3. We end in natural daylight using a transparent liquid (sometimes it
    is under crystals form like clear brown sugar and sometimes of yellowish
    orange clear powder which is melted to water). We put the prints in it.
    Immediately, prints become clear pictures with all details and colours.
    Then, we wash and dry. Pictures are ready.
    According to your experience, what could be this last product?

    Thanking you for your attention and help,
    With best regards.

    Albane Verder
     
    Albane, Jul 22, 2004
    #1
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