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  1. A
    Concentrated long lasting paper developer formula

    200g/liter of sodium carbonate could be put into solution in id 62 or another developer? What about a fully soluble amount of sodium carbonate plus some amount of hidroxide?

  2. A
    Concentrated long lasting paper developer formula

    https://pubchem.ncbi.nlm.nih.gov/source/hsdb/5018#section=Solubility-(Complete If you don't mind a few crystals when it cools down, note that the part B of Pyrocat HD can be 200g/L sodium carbonate: https://unblinkingeye.com/Articles/PCat/PCat2/pcat2.html

  3. A
    Concentrated long lasting paper developer formula

    There is... Id 62 could go into solution more concentrated to be diluted 1+9 but using potassium carbonate and hidroxide because sodium carbonate is not so soluble... Im trying to use sodium carbonate not potassium...

  4. A
    Concentrated long lasting paper developer formula

    Not very convenient... Its for school use and i want to mimic the convenience of 1+9 and economy...
  5. Raghu Kuvempunagar

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    Concentrated long lasting paper developer formula

    You can turn ID-62 into a two part formula easily where the first part is glycol based and the second part is mixed as per need. No need for any Potassium salts. First part contains only Phenidone and Hydroquinone and is long lasting.

  6. A
    Concentrated long lasting paper developer formula

    Id 62 is very long lasting as is d-72 but i would really like to have a long lasting concentrated Dev... 1+9 would bem great!

  7. A
    Concentrated long lasting paper developer formula

    in id-62 type developer could i substitute potassium carbonate (more soluble but more expensive) for some some sodium carbonate plus hidroxide? This without altering stock and tray longevity and activity?
  8. KPA40

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    Concentrated long lasting paper developer formula

    I would take a look at the concentrated formula for Ilford ID-62 on Ian Grant's site. There are other concentrated developers there as well. http://lostlabours.co.uk/photography/formulae/formulae.htm Olaf
  9. Ian Grant

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    Paper Developers?

    ...version there could be problems with Sodium Carbonate precipitating out, then I spotted a concentrated PQ developer in an Ilford Patent and realised it was PQ Universal which is the liquid version of ID-62 so switched to Potassium Carbonate and the small amount of Sodium Hydroxide. Ian
  10. gorbas

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    Paper Developers?

    Ian, can you please share with us final and full recipe of your modification? Thank you in advance!
  11. Ian Grant

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    Paper Developers?

    I use ID-78, which is only a slight variant of ID-62, no Benzotriazole and more Bromide as it's a Warm tone developer, others who use it say it'' keep 2 or 3 sessions, In a Nova system it will, in a tray covered personally I'd rather use fresh developer. As I've written numerous times I mix to a...

  12. A
    Paper Developers?

    I've been mixing ID-62 from scratch mostly these days. D-72 as well, but less often. I make as much as I need for a session or mix a stock solution if I'm planning on printing for several days. Once you have the raw chemicals, mixing your own developer is faster, easier and cheaper. Doremus
  13. Ian Grant

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    Paper Developers?

    ...results. The issue with MQ developers is Metol is development is retarded as Bromide builds up on a printing session. My choice is ID-78 although I make to a commercial strength rather than the published formula, however it's a Warm Tone developer. It's a variant of ID-62 (PQ Universal). Ian

  14. A
    Which chemicals oxidise?

    ...spoon recipes figured this way are more than precise enough for consistent results. Many print developers are the same; I mix D-72 and ID-62 with spoon recipes all the time. An alternative to mixing small amounts from powder is to use a liquid concentrate developer like HC-110 (Ilfotech HC...

  15. A
    FB test strip dev time same as the print dev time?

    ...but after a certain point, you're just adding overall density and risking fogging the whites. FWIW, my standard times in D-72 (Dektol) and ID-62 is 2.5 minutes. Make your test strip, find your base exposure and make a "first print." Decide on what improvements, manipulations, changes you...
  16. Raghu Kuvempunagar

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    precipitation B&W reversal processing

    I used ID-62 with appropriate amount of Potassium Thiocyanate earlier and then my own brew of first developer. Haven't reversed Delta yet, but your results are encouraging me to try.
  17. Raghu Kuvempunagar

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    DIY developer & fixer for paper. Need formula recommendations

    ID-62 is an excellent developer for paper negatives and also as first developer in reversal processing of paper.

  18. A
    First their paper developer was brown, now the film developer

    Agreed: D-76 is ridiculously easy to make from scratch (get thee to ArtCraft) and ultimately less expensive. D-76 Ingredients/chemicals you need: 750ml of Water 2gm of Metol 100gm of Sodium Sulfite anhydrous 5gm of Hydroquinone 2gm of Borax Cold water to make 1 liter...

  19. A
    Just completing building a B&W darkroom..., where should I start

    ...of the other standards will do you just fine. If you feel more adventurous, it's really easy to mix your own D-72 or (my favorite these days) ID-62, but you have to make the initial investment in raw chemicals. Your decision. Stop bath: Kodak indicator stop is cheap and lasts forever...
  20. Dave Krueger

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    Dektol vs D72 (My Observations)

    Thanks for the ideas. I really don't need to be that frugal with darkroom chemistry anymore, but I have developed habits over the years (and pinching pennies is one of those habits). I could certainly use my developer for fewer sessions and avoid the discoloration, but I just don't feel...

  21. A
    Dektol vs D72 (My Observations)

    My observations. I've used Dektol, D-72, Zone VI developer (which was, I believe ID-62, but some say it's just D-72), Bromophen, ID-62 and Liquidol plus a few glycin developers, etc. that are irrelevant here. I mix mostly from scratch what I need for a session, usually 2-4 liters of working...
  22. RalphLambrecht

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    Dektol vs D72 (My Observations)

    it would be interesting to knowthe amount of preservative(sodium sulfite) in each of these developers.
  23. Dave Krueger

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    Dektol vs D72 (My Observations)

    ...brown sooner than the Dektol which leads me to think that Dektol and D72 are not really clones of each other. Because of that, I tried mixing ID-62 and also bought some Freestyle powder paper developer, both of which also turned brown sooner than Dektol (but no sooner than the D72). The...

  24. A
    B&W reversal: Thiocyanate or Thiosulfate

    Ah. OK. Sorry. I thought it was PQ. Thanks though :-) They might have though. Using it as a second developer sounds kind of interesting then... did you ever do that, if so... did you use regular dilutions and times?
  25. Lachlan Young

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    B&W reversal: Thiocyanate or Thiosulfate

    No, that's ID-62, dilute 1+1 for reversal FD. PQ Universal is a much more concentrated version. The problem with too much sulphite already in the developer is it doesn't make it easier for you to finesse solvent or accelerators - as you already have added a potentially troublesome variable with...

  26. A
    B&W reversal: Thiocyanate or Thiosulfate

    Isnt this: Sodium sulphite, anhydrous = 50 grams Sodium carbonate, anhydrous = 60 grams Hydroquinone = 12 grams Phenidone = 0.5 grams Potassium bromide = 2 grams Benzotriazole (1% solution) = 20 ml Water to 1 litre. PQ? How much sulphite would PQ contain compared to the others? EDIT: There...
  27. Lachlan Young

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    B&W reversal: Thiocyanate or Thiosulfate

    Consider the dilutions - and that recipe you linked is essentially ID-62 rather than the much more concentrated PQ Universal, either way at the dilution recommended (PQ Universal 1+5), you're looking at about 30g/l sulphite - D-11 is used at full strength.

  28. A
    Not Recommended...But I'm Trying It...

    I don't know about your recipe Wayne, but this is the one that I've been using and it works brilliantly! But as said by many, one can be a bit casual almost, with varying amounts of the chemicals and still get good results. :) Terry S Kodak D-72 Print Developer Metric Spoons and Ounces...

  29. A
    Not Recommended...But I'm Trying It...

    I think I see what you did now, except for the sulfite. This is presumably to directly make a 1:2 working solution, not a stock solution. The numbers work out a lot more well rounded than they do for a liter of stock. But why so much sulfite? That's more than half the sulfite of the stock...

  30. A
    Not Recommended...But I'm Trying It...

    +1000. To my mind D72 was Kodak's best kept hidden secret (along with their much-maligned film developer, the infamous DK60a) and several of my fellow darkroom enthusiasts who also mix their own at home agree with this. D72 is easily whipped up and bending a few rules in the mix can produce...
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