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  1. Re: Advice On Uneven Development On Film Edges

    Old timers used to mix Pyro developers fresh every time from ingredients. Pyro dust can be harmful if inhaled.
  2. Re: Advice On Uneven Development On Film Edges

    Ian, how many 4x5 sheets are you developing at a time in the Stearman tank? As an alternative to Stearman, you can try the Taco method in a day light development tank like Paterson. Up to four sheets...
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    Re: 510 Pyro - First Impressions

    Any reason why you didn't use the recommended dilution of 1:100 for 510-Pyro? Any dilution of 510-Pyro weaker than 1:100 is to be treated with skepticism due the very low amount of developing agents...
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    Re: 510 Pyro - First Impressions

    Anything more dilute than 1:100 is bound to be problematic due to the very low amount of developing agents in the working solution. Combined with stand/semistand, this is a sure recipe for...
  5. Re: Processing 510 Pyro & 100TMX with Jobo CPP-2

    Can't argue against the obvious possibility of Kodak and other labs having investigated the potential of pyrogallol and catechol developers in the light of works such as Levy's. Even the new lab...
  6. Re: Processing 510 Pyro & 100TMX with Jobo CPP-2

    Hello Lachlan,

    There is at least one published research work from 60's which says "a low pH formulation, consisting only of pyrogallol, Phenidone, and sodium sulphite (pH 8.30) yields a higher...
  7. Re: Processing 510 Pyro & 100TMX with Jobo CPP-2

    I use this TEA. It says purity is 98% and water content is less than 0.5%. It has always remained a viscous liquid and room temperature here is generally 25C and above.

    Jay originally used...
  8. Re: Processing 510 Pyro & 100TMX with Jobo CPP-2

    Which grade TEA did you use? Lower grade TEA contains some water which can potentially influence the shelf-life of the concentrate.
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    Re: Beutler-Pyro: a different formula

    In the meanwhile I reached out Herald Leban, the inventor of this developer, and asked him several technical questions. Herald kindly provided very useful inputs that could be of interest to others...
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    Re: Beutler-Pyro: a different formula

    Hello @cariocakev, thanks for your response. Good to know that you're still using this developer and continue to be happy with the results. I read your endorsement of the developer as the absence of...
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    Re: Beutler-Pyro: a different formula

    Are there any active users in this forum of this developer that seems to have not gained many adopters? Any insights you can share from your experience of using this developer? How does it compare...
  12. Re: Developing Litho film with lower contrast

    There's one more low contrast developer of some repute - Delagi 8 which supposedly "gives better tonal separations with slightly higher contrast than regular Pota":

    Water @38C: 500 ml
    Sodium...
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    Re: E6 film in C41 chemistry?

    This could be of interest to you:

    https://www.photrio.com/forum/threads/how-to-consistently-make-positive-e-6-transparencies-with-c-41-chemicals.160510/
  14. Re: B&W Reversal trouble-shooting (bleaching in particular)

    Dichromate bleach is indeed the best bleach for reversal processing. Toxic it is but safe disposal of used bleach is a practical challenge. I believe that's he reason why many want to take the path...
  15. Re: B&W Reversal trouble-shooting (bleaching in particular)

    You may want to try doing bleach-by-inspection in a tray under red safe light or subdued light till all the silver in the negative image is bleached out. Note that the bleach formula based on...
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    Re: Developer Formulas for C-41 film?

    Hello Sandy,

    Not exactly what you asked for, but something that could be useful to you if you want to explore developing expired C41 film in Pyrocat-HD. Yes, it gives very decent results. :)
    ...
  17. Re: How do I get a warmer tone when developing BW film?

    Toning, in the case of slides, can be done in two different ways - 1) by using a toner itself as the second developer. For example, you could make a sepia toner by dissolving a gram or two of...
  18. Re: How do I get a warmer tone when developing BW film?

    You can perhaps consider taking the route of dichromate intensification to get warm-tone slides. Haist** says: "When a silver image is intensified by using potassium dichromate-hydrochloric acid...
  19. Re: Anyone Use Shanghai GP3 Film in 4x5 and 8x10

    Here it is: https://www.photrio.com/forum/threads/testing-some-new-film-shanghai-8x10-how-i-do-it.171836/page-2#post-2238060
  20. Re: View camera as extinction light meter

    Key thing to note is the following:

    "When your eyes have become fully adjusted to the light on the ground-glass image, close the lens diaphragm gradually until details in the share are barely...
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    Re: Trying out Chromium intensifier

    Chromium intensifier works by forming a chromium compound imagewise when the slide/print is bleached. As the bleach is rehalogenating, the original image density is gotten back by redevelopment and...
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    Re: Trying out Chromium intensifier

    As long as it is pure 5% acetic acid, it should work.
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    Re: Trying out Chromium intensifier

    For the bleach to work as an intensifier, it needs to be rehalogenating - i.e. it should convert all silver to silver halide which can be redeveloped subsequently. This is the reason why hydrochloric...
  24. Re: Adox CMS 20 Slides, what bleaching chem ???

    This is very interesting, especially the high temperature processing. Which dilution did you use?



    I'm glad it worked for you. Thanks for confirming.
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    Re: Overhead still lifes

    Thanks Drew. I think I'll give it a try.
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    Re: Overhead still lifes

    Drew, I'm interested in this attachment for a different use - in-camera paper positives. Does the attachment reduce overall image quality?
  27. Re: Film curves and density range in reversal development

    Well-made slides have very good contrast and DMax as you are using the full range of densities that the film is offering you. DMin can vary depending on the film and how effective the reversal...
  28. Re: Film Shots - A new iOS/Android app for taking field notes with Lightroom integrat

    +1
  29. Re: Toning Van Dyke brown prints with thiourea

    Hey! This is so nice of you! Thanks a lot!!
  30. Re: Adox CMS 20 Slides, what bleaching chem ???

    I'm not Malanov but this is the process which gave me very decent results for Adox CMS 20ii in 135 format, in case you're interested in knowing:

    EI: 6 and sometimes 8
    Processing temperature: 23C...
  31. Re: Adox CMS 20 Slides, what bleaching chem ???

    Congratulations! Would you mind sharing the scanned images if it is not too much of a problem?
  32. Re: Adox CMS 20 Slides, what bleaching chem ???

    Please note that bleaching with copper sulphate-sodium chloride is a two step process unlike dichromate/permanganate. See this thread for more details:...
  33. Re: Adox CMS 20 Slides, what bleaching chem ???

    4-5 minutes. But you should test with a small strip and determine the time required.
  34. Re: Toning Van Dyke brown prints with thiourea

    No worries! I knew it was a long shot.
  35. Re: Adox CMS 20 Slides, what bleaching chem ???

    PEG isn't a magic bullet IMO. Increasing the proportion of an ingredient beyond what is recommended can potentially cause unintended effects. You can try adding hypo, but it may reduce density in...
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    Re: B&W Paper Reversal New Method?

    Interesting approach! Did you notice any loss density when using periodate+chloride bleach on paper? As paper has chloride in it, wouldn't Ammonia eat up some of it and lead to loss of density?
  37. Re: Adox CMS 20 Slides, what bleaching chem ???

    Could be due to underexposure. What is your exposure index for this film? It won't give the box speed of 20 in anything other than Adotec developer. I rated the film at 6 and got pretty decent slides.
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    Re: B&W Paper Reversal New Method?

    Previous discussion on 'new' methods:
    https://www.photrio.com/forum/threads/now-this-is-cool.171296/#post-2230443

    Technical discussion on 'old' RA4 reversal techniques:...
  39. Re: Toning Van Dyke brown prints with thiourea

    That's interesting! Thanks for sharing your experience. Is it possible to share a picture of Thiourea toned VDB print if it is not too much of an effort?
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    Re: B&W Paper Reversal New Method?

    Joe definitely deserves credit for popularizing paper reversal through his innovative ideas and videos. But B&W paper reversal gets 'reinvented' frequently with different people using different...
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