Hi Boon,
That's a nice one. I guess if this (direct positive?) film is developed in a paper strength developer like Ilford PQ Universal, the contrast will be better, highlights will be more...
Type: Posts; User: Raghu Kuvempunagar; Keyword(s):
Hi Boon,
That's a nice one. I guess if this (direct positive?) film is developed in a paper strength developer like Ilford PQ Universal, the contrast will be better, highlights will be more...
Hi Boon,
That's very strange indeed! The film I received is a true negative film (i.e. one that develops as a negative when developed with developers like D-76). To make transparencies out of...
Hello Andy, that makes perfect sense, thanks. Regarding base fog, since you have used D-23 previously for developing X-ray film, I was wondering if the high base-fog you observed with B2B is mostly...
Nice video Andy, TFS. What was your EI for this film-developer combination?
The density readings in the video left me a little confused - base fog was 0.34 but shadow density (Zone 3) was 0.24.
Old timers used to mix Pyro developers fresh every time from ingredients. Pyro dust can be harmful if inhaled.
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...
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...
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...
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...
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...
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...
Which grade TEA did you use? Lower grade TEA contains some water which can potentially influence the shelf-life of the concentrate.
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...
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...
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...
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...
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/
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...
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...
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. :)
...
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...
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...
Here it is: https://www.photrio.com/forum/threads/testing-some-new-film-shanghai-8x10-how-i-do-it.171836/page-2#post-2238060
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...
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...
As long as it is pure 5% acetic acid, it should work.
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...
This is very interesting, especially the high temperature processing. Which dilution did you use?
I'm glad it worked for you. Thanks for confirming.
Thanks Drew. I think I'll give it a try.
Drew, I'm interested in this attachment for a different use - in-camera paper positives. Does the attachment reduce overall image quality?
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...
Hey! This is so nice of you! Thanks a lot!!
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...
Congratulations! Would you mind sharing the scanned images if it is not too much of a problem?
Please note that bleaching with copper sulphate-sodium chloride is a two step process unlike dichromate/permanganate. See this thread for more details:...
4-5 minutes. But you should test with a small strip and determine the time required.
No worries! I knew it was a long shot.
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...
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?