D76 1:1 - how to stock it?

Discussion in 'Darkroom Developing and Printing' started by Dabar, Jul 15, 2003.

  1. Dabar

    Dabar Guest

    Do You dilute it 1:1 and then keep it as such? In the fridge or it doesn't
    matter? Do You do the stock solution and then further dilute it with water
    just prior to developing. Does it matter at all? What is it's lifespan in
    either case?

    thanks in advance :)

    Dabar, Jul 15, 2003
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  2. You keep the stock solution (3.8l from a 3.8l-package) in brown, airtight
    bottles and dilute immediately before usage.

    Stock solution keeps at 6 month in a tight bottle, diluted working solution
    keeps a few hours.

    Martin Jangowski, Jul 15, 2003
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  3. Dabar

    John Guest

    If you store the solution in brown glass or PET bottles that are full to
    the top, the only oxidation will be from the O2 in the water. Degradation will
    be very, very slow and I'd give it at least a year on the shelf. Possibly 3.
    Some may consider this outrageous but I have mixed Microphen (a PQ formula
    similar to D-76) and used it over the last 3 years without seeing any
    degradation in the developer.


    John - http://www.darkroompro.com
    Anyone that says
    "The best things in life are free"
    never had children !
    John, Jul 16, 2003
  4. Mix the stock solution and store it in a series of closed bottles. For 1
    gallon I use two quarts three pints and two half-pints. I use glass
    marbles to "top off" the bottles. As the smaller bottles are emptied I
    refill them from the larger bottles.
    WB3FUP \(Mike Hall\), Aug 27, 2003
  5. It's best to wait a day or two after mixing, to be sure all powder has
    dissolved. Otherwise, you risk dust-like spots on the film.
    Michael Scarpitti, Aug 27, 2003
  6. Besides storing in small dark colored containers (reduces chances of
    oxidizing) you may want to consider using distilled water when mixing stock
    solution. Keeps about 3 months stored properly. Oxidation and light are the
    bad guys!
    Robert J. Mathes, Aug 27, 2003
  7. At a hobby or craft store. Take your bottles, at least one of each size.
    The ones I use are made for frying, and then making jewelry and are clear

    73 es cul

    a Salty Bear

    WB3FUP \(Mike Hall\), Aug 27, 2003

  8. Cheers for the advice. Frying?
    ------- o
    ----- <#\,
    --- ()/()
    Belfast Biker
    "When Religion And Politics Ride In The Same Cart.....The Whirlwind Follows"
    belfast biker, Aug 28, 2003
  9. I use the 500ml PET bottles used for bottled water. Remove air, then
    into the freezer. Nuke prior to use and adjust temp. Note that some
    stock solutions should not be frozen as some components will separate
    out, and also they can take a few days to fully freeze due to FP
    depresion by the chemical content. Remember to label and date them!

    Paul Repacholi 1 Crescent Rd.,
    +61 (08) 9257-1001 Kalamunda.
    West Australia 6076
    comp.os.vms,- The Older, Grumpier Slashdot
    Raw, Cooked or Well-done, it's all half baked.
    EPIC, The Architecture of the future, always has been, always will be.
    Paul Repacholi, Aug 28, 2003
  10. Has anybody tried using the "vacuvin" seals that are commonly available from
    supermarkets etc?

    These are basically rubber bungs that come with a little vacuum pump for
    removng the air from partly empty bottles of wine.
    I bought some a while back for their intended purpose but they don't get
    used much (because I don't get many partly empty bottles of wine ;?)


    bob whitehouse, Aug 28, 2003
  11. Dabar

    Norman Worth Guest

    You have to store D-76 undiluted for it to last at all. Then dilute it 1:1
    just before use. Even undiluted it changes over a very short time. Two
    months is probably a good maximum for keeping it. Storage in bottles that
    are not permeable to air is a good idea. A good storage container may
    extend the developer life. Polyethylene in not a good container for
    developers. I've found that 2 liter soft drink bottles are excellent,
    Norman Worth, Aug 29, 2003
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