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  1. #1
    Christopher Walrath's Avatar
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    Ilford ID-78 Paper Developer

    Ilford's ID-78 Paper developer is a phenidone-hydroquinone developer for papers, producing warm tones on contact and enlarging papers and on lantern slide plates.

    Warm Water (52C or 125F) . . . 600cc
    Sodium Sulphite, dess. . . . 50g
    Hydroquinone . . . 12g
    Sodium Carbonate, dess. . . . 62g
    Phenidone . . . 0.5g (May substitute Dimezone-S at 0.63g)
    Potassium Bromide . . . 0.4g
    Add water to make . . . 1 litre

    This makes a stock solution. Dilute one part of the above stock solution with one part of water (1:1 with water) and develop for one minute at 20C (68F). For longer development times, dilute one part stock solution with three parts water and develop for two minutes at 20C (68F).
    Thank you.
    CWalrath
    APUG BLIND PRINT EXCHANGE
    DE Darkroom

    "Wubba, wubba, wubba. Bing, bang, bong. Yuck, yuck, yuck and a fiddle-dee-dee." - The Yeti

  2. #2
    Ian Grant's Avatar
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    POST THE CORRECT FORMULA PLEASE

    This has already been listed here on Apug anyway but IT CONTAINS 4.5 gms POTASSIUM BROMIDE per litre and not 0.4 gm which was a mistake in the Photo Lab Index

  3. #3
    Christopher Walrath's Avatar
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    I apologize. It is too late to change. There are too many errors in the literature I have so I will refrain from sharing the info in the future. The Ilford Manual of Photography is apparently in error.
    Thank you.
    CWalrath
    APUG BLIND PRINT EXCHANGE
    DE Darkroom

    "Wubba, wubba, wubba. Bing, bang, bong. Yuck, yuck, yuck and a fiddle-dee-dee." - The Yeti

  4. #4
    Christopher Walrath's Avatar
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    And I ran a personal catalog of all the formulas contained herein and did not find ID78n the reason for posting it. Sorry all. My bad.
    Thank you.
    CWalrath
    APUG BLIND PRINT EXCHANGE
    DE Darkroom

    "Wubba, wubba, wubba. Bing, bang, bong. Yuck, yuck, yuck and a fiddle-dee-dee." - The Yeti

  5. #5
    Ian Grant's Avatar
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    Chris, yet again a lot of articles have disappeared, this formula has been posted in the relevant section twice before, once I think by Tom Hoskinson who used to use the developer himself.

    The "Ilford Formulae & Packed Chemicals", published 1960 and the two Ilford Manuals of Photography that I have with it in all show the formula correctly as does LFA Mason (of Ilford) in his book Photographic Processing Chemistry.

  6. #6
    Christopher Walrath's Avatar
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    Correction, Wall's book.

    And I did run a few googles and every other reference for this formula goes with Ian's 4.5 grams of Potassium Bromide.
    Last edited by Christopher Walrath; 02-21-2011 at 06:29 PM. Click to view previous post history.
    Thank you.
    CWalrath
    APUG BLIND PRINT EXCHANGE
    DE Darkroom

    "Wubba, wubba, wubba. Bing, bang, bong. Yuck, yuck, yuck and a fiddle-dee-dee." - The Yeti

  7. #7

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    Can we replenish ID-78? How much is the replenishment rate?

  8. #8
    Ian Grant's Avatar
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    If you replenish other paper developers then this one's no different and has a good tray life covered.

    However personally I don't recommend replenishing any paper developer, I use the apprpriate amount for a printing session and use fresh dev each time.

    Ian
    Last edited by Ian Grant; 04-25-2012 at 06:39 AM. Click to view previous post history. Reason: typo

  9. #9
    RalphLambrecht's Avatar
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    amen to that.everything else is a waste of time and materials.
    Regards

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



 

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