Cool tones, Warm tones Neutral tones

Cool tones, Warm tones Neutral tones

  1. Ian Grant

    Ian Grant Subscriber

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    Ian Grant submitted a new resource:

    Cool tones, Warm tones Neutral tones - Cool tones, Warm tones Neutral tones

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    Last edited by a moderator: Feb 6, 2016 at 5:26 PM
  2. Tom Hoskinson

    Tom Hoskinson Member

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    Thanks for posting these Iford formulas, IAN!

    I am a happy ID-78 and Ilford PQ user
     
  3. Rob Archer

    Rob Archer Member

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    Thanks - I've been looking for this info for a while.

    Onw question - what temperature do you mix them at. I usually 40degC for pre-packaged devs.

    Rob
     
  4. Ian Grant

    Ian Grant Subscriber

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    40-50ºC should be fine

    Ian
     
  5. john_s

    john_s Member

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    Shouldn't ID-14 have some hydroquinone in it?
     
  6. Ian Grant

    Ian Grant Subscriber

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    Quite right John, slipped up there it's corrected now.
     
    Last edited by a moderator: Oct 25, 2007
  7. Ian Grant

    Ian Grant Subscriber

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    The Benzotriazole free formula is identical to Forte FD-203 which is the recommended developer for Forte's Polygrade papers including Poly-warm tone.
     
  8. Ian Grant

    Ian Grant Subscriber

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    The Bromide added should be a 10% KBr solution not 1%

    Ian
     
  9. delphine

    delphine Member

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    Do you know what was in the Ilford cooltone developer which is now discontinued?

    Thanks

    Dee
     
  10. Ian Grant

    Ian Grant Subscriber

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    Cool tone developer used a proprietary anti-fogging agent which Ilford don't want to divulge, this is probably why they won't publish the formula now it's discontinued.

    Ilford's current commercial print developers may well substitute Potassium Carbonate and Sodium or Potassium Hydroxide for the Sodium Carbonate, this allows greater solubility and concentration and reduces costs slightly. (Ilford Patents indicate this).

    Ian
     
  11. Adrian Twiss

    Adrian Twiss Member

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    The concentrated PQ developer you mention when diluted 1+4 acts like the old Ilford IFF high contrast developer. Thanks for posting this. I like cool tone developers.
     
  12. pavelt2tk0

    pavelt2tk0 Member

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    Hi all, Just tried to mix this concetrated solution, but fell in trouble - first batch had crystals of Hydroquinone after 1 week of storage, then Idecided to make another batch with ethyleneglycol added to prevent hydroquinone crystallization, this batch gave worse result - everything crystallized in one large ice-like piece.....

    Does anybody know how to prevent crystallization? Or maybe there is some mistake in the formula?
     
  13. Ian Grant

    Ian Grant Subscriber

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    I've been making up concentrated ID-78 for over 20 years now and never had a problem. You can replace the Sodium Carbonate with Potassium Carbonate & Potassium or Sodium Hydroxide which allows far greater solubility. Assume Potassium Carbonate (anhyd) 12 g + Potassium Hydroxide 4 g is approx equivalent to 60-62 gms Sodium Carbonate (Anhyd).

    The alternative is make a weaker concentrate. My darkroom never falls below about 12-14°C so crystallisation of any developer is rare anyway.

    Ian
     
    Last edited by a moderator: Jan 20, 2009
  14. pavelt2tk0

    pavelt2tk0 Member

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    Thank you. Will try to substitute sodium carbonate.
    Regarding temp - I stored the first batch under room temp, about 25C, the second went out of the room where the temp is about +2..+4C.

    But they crystallized both, just differently.
     
  15. Shadowtracker

    Shadowtracker Member

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    I wonder if order-of-mixing has anything to do with the crystal formation?
     
  16. Ian Grant

    Ian Grant Subscriber

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    No it makes no difference.

    I now make up my concentrated developers using Potassium Carbonate and Sodium Hydroxide instead of Sodium Carbonate and this works well. This is in fact how commercial liquid concentrates are prepared and my stock lasts well over 6 months in a half full bottle with no crystallisation even in the winter in an unheated darkroom.

    Ian
     
  17. Des

    Des Member

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    Ian.
    I have been looking for information such as this for ages.

    Thanks

    Des
     
    Last edited by a moderator: Jul 14, 2010
  18. Ian Grant

    Ian Grant Subscriber

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    It's a close enough substitution. So works OK.

    Ian
     
  19. yeknom02

    yeknom02 Member

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    Ian, I am wondering about the Benzotriazole solution (1%) in the PQ Developer - is this a 1% solution in water, or a type of alcohol? I have heard that BZT is difficult to dissolve in water. Also, is it added at the time of working dilution, or during the initial mix? And is it needed at all to produce cool tones? Finally, what are the shelf lives of the two dilutions of PQ that you have listed?

    Sorry for so many questions at once.
     
  20. Max_N

    Max_N Member

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    Ian, in this formula

    Concentrated Stock Solution.

    Ilford PQ Developer (Conc) - Cool Tones

    Phenidone . . . . . . . . . . . . . . . . . 1.25 g
    Sodium Sulphite (anh) . . . . . . . . .125 g
    Hydroquinone . . . . . . . . . . . . . . 30 g
    Sodium Carbonate . . . . . . . . . . . .150 g
    Potassium Bromide . . . . . . . . . . . 5 g
    Water to . . . . . . . . . . . . . . . . . 1 litre

    Sodium Carbonate mono or anhd?

    Thanks
     
  21. Ian Grant

    Ian Grant Subscriber

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    Since I wrote this article I've found it's better to substitute Potassium Carbonate (anhyd) with a small amount of Sodium Hydroxide in place of the Sodium Carbonate (anhyd) because of solubility issues with storage.

    So something like 100g Postassium Carbonate (anhyd) + 5g Sodium Hydroxide works well in place of the 150g Sodium Carbonate.

    Ian
     
    Last edited by a moderator: Mar 7, 2012
  22. Max_N

    Max_N Member

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    Thanks!

    In some sites I seen this formula with 150 g Potassium Carbonate only, and if you are interested, I know some similar developer:

    Riap PB-1k (russian)

    Sodium Sulphite (anh) . . . . . . . . .150 g
    Hydroquinone . . . . . . . . . . . . . . 32 g
    Potassium Carbonate . . . . . . . . . .150 g
    Phenidone . . . . . . . . . . . . . . . . . 0,8 g
    Potassium Bromide . . . . . . . . . . . 6 g
    Water to . . . . . . . . . . . . . . . . . 1 litre

    1+9