Kodak Rapid Selenium Toner

Discussion in 'Kodak' started by Alan Smithee, Nov 1, 2005.

  1. Alan Smithee

    Alan Smithee Guest

    What's the best way to mix, work and store KRST? Does one prepare and keep
    it as a working solution from the liquid (say, mix up a litre) or use it one
    shot? How long can it keep in the tray? How toxic is it just sitting in the
    tray evaporating? Some explanation about when to use what ratio would
    probably help me too. I'm toner Agfa RC paper with it. Thx. Oh yeah, latex
    gloves are OK or do I need rubber gloves?
    Alan Smithee, Nov 1, 2005
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  2. Put the amount of concentrate you wish to use in a beaker and add water
    until you get the concentration you want.
    I mix up a tray full and use it that day, or until it slows down too much.
    I never keep it overnight because it tends to stain plastic trays.
    Not very. It says nothing about being poisonous on the label, but I sure
    would not drink it. I think 50 to 200 micrograms/day are essential to proper
    nutrition, but larger amounts can be toxic.
    It depends on what you want to do. Kodak recommend 1+3 (IIRC), but that is
    way too strong for me. I do not normally want a color change, or if I do
    (depends on the paper), a very slight one. So, depending on the paper, I mix
    up 1+9 or 1+19.
    I do not know if you need gloves at all. I do not believe Ansel Adams used
    gloves, and he did not die of selenium poisoning AFAIK. I use some heavy
    black butyl (?) gloves, but they are a bit clumsy. I do not use gloves for
    anything else.
    Jean-David Beyer, Nov 1, 2005
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  3. The working solution keeps, as does the stock -
    I don't know if it ever goes 'off', it hasn't
    in my lifetime.
    Until evaporation becomes a problem. I found putting
    the chemicals away to be easy since I started using
    wide-mouth Nalgene bottles and a good funnel.
    It doesn't produce 'toxic fumes' though it lets off some ammonia.

    Once evaporated it leaves a red powder which, I suppose,
    could become airborne and do something/nothing. I always
    find red splotches here and there the day after toning and
    just wipe it up.

    Selenium is nominally poisonous, as are all metals
    A little bit of selenium is required for life and is an
    ingredient in most vitamin/mineral supplements and also
    shows up in dog food. Don't drink the stuff; keep it
    out of reach of the South Park crowd -- all the usual
    common sense stuff.
    SA [Standard Advice] is to use 1:9 for ~1-2 minutes.
    Most like to pull the print before it starts to go purple:
    put another tray alongside with water and an untoned
    print [good use for discards]. Tone until you _just_ see
    a color change in the light-greys when looking from one
    print to the other. W/O the reference print I find I
    invariably tone too much: When I can easily see it
    start to go purple it is too late because it has
    already turned to a noticeable purple [sorta obvious
    logic, no?].

    You can tone for as long as you like. Warmtone papers
    can develop some really nice colors with selenium: I go
    for this really rich/deep chocolate color.

    I found time to be unreliable as an indication. Toning
    seems sensitive to paper age, paper type, time in the developer,
    temperature and other stuff of which there is too much
    of to try and keep track.
    IRC Agfa RC isn't a good choice for toning, I for sure
    don't like the results with Ilford RC. I use Seagull
    graded glossy DW. Results were great with Agfa Portiga,
    but that is long gone.
    I don't use gloves with it, but then I don't have
    my hands in it for long periods of time. Tongs are
    my instrument of choice if I don't want to get my
    hands wet.

    For gloves, I like the purple nitrile gloves. I
    have difficulty finding them in XL and need to
    go to a medical supply store.
    Nicholas O. Lindan, Nov 1, 2005
  4. Alan Smithee

    Mike King Guest

    If you are just toning for protection and using a dilute solution plan on
    one day in the tray. If you are using a stronger mix I used to mix it with
    HCA and keep using it until it just quit toning. Last a long time, old labs
    that brown toned Ektalure with KRST used to leave the tray in the sink and
    just cover it between sessions.
    Mike King, Nov 6, 2005
  5. Alan Smithee

    Bill Guest

    Ansel may not have used gloves, but his assistant John Sexton does now. I
    get my Nitrile (extra large) from Grainger Industrial Supply
    (www.grainger.com). You need a company name--they don't sell to people.
    Bill, Nov 10, 2005
  6. I think they now sell to individuals. In any case they sell to farmers.
    _Everybody_ is a tomato farmer, right? Small crop, I farm about 6 sq ft...
    Nicholas O. Lindan, Nov 10, 2005
  7. Bill spake thus:
    BS. I've bought stuff there; just went in, asked for it and paid for it.
    No magic.

    .... asked to comment on Michigan governor George Romney's remark that
    the army had "brainwashed" him in Vietnam—-a remark which knocked Romney
    out of the running for the Republican nomination—-McCarthy quipped,
    "I think in that case a light rinse would have been sufficient."

    (Eugene McCarthy, onetime candidate for POTUS)
    David Nebenzahl, Nov 11, 2005
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