Photo Engineer
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All companies used a variety of color developing agent depending on product and desired features. These changed many times for any given product.
PE
PE
I had a hard time getting the NaOH out of the little bottle, finally put on my face shield added some water to the bottle, as expected it got warm in my gloved hand but came out no problem.
In a previous "life" I made up 50L batches of 50% NaOH solutions for Kjeldahl Nitrogen assays. Nothing to it. There was only about 2 grams of NaOH in the bottle. The exciting part of the old school Kjeldahl method was layering the NaOH solution over the conc. Sulfuric Acid in the flask. If you did it right you would get the flask hooked up to the distillation column before you "Swirled" the flask to mix the solutions, there was a glass trap on top of the flask to keep the flask from blowing the contents straight through the column. It got kind of exciting sometimes. Now they have auto analyzers. Just push a button.That was likely the first thing we learned in chemical class not to do.
You are a bold chemist nevertheless...
Well... a shielded one,.
I have looked at the film dry. It's quite underexposed for the process. The film numbering is barely visible which indicates to me that if I would extend 1st Developer time or raise the temperature it could be made to work at the proper speed. I think at these conditions ISO is about 25 max. I'm going to try a couple more rolls see what I get. One other thing that occurred to me is the 1st Developer volume may be to small. I may try a bigger tank.Exscue me
I'm glad to hear you've had such a good fortune, it was worth it! ... but only a couple of rolls?, use it until exhausted! (even exhausted). Prewash the films you use to extend the working life of chemicals. Congratulations!
I have looked at the film dry. It's quite underexposed for the process. The film numbering is barely visible which indicates to me that if I would extend 1st Developer time or raise the temperature it could be made to work at the proper speed.
At this point all I'm interested in is seeing if I can get a couple decent looking transparencies just to say that I did it.
It takes about an hour and a half start to finish
The frame numbers that are pre exposed by Fuji are barely visible, my conclusion is either the 1st Developer is either less active due to age or my Jobo is oxidizing it, or I don't have enough active developer in the tank due to the low volume used by the Jobo, Or most likely it's a miracle that it works at all. I did say a Hail Mary and invoked Veronica the Patron saint of Photographers and Laundry workers.@mshchem.
May I ask what you mean by „numbers are barely visible“? Is your developed film to bright, or too dark??
Edit: uuups, too late... Anyway, phantastic results
stefan
Ok, so do I bracket again at rated ISO and raise temperature to 85F? It’s definitely way under developed but the solutions are clear not muddy at all. It looks better than the Tetenal stuff that is sold today . What is the purple hardener (chromium ? ) My biggest concern for disposal is heavy metals.Lower temp processing of modern color products will cause severe overall problems with speed, grain, sharpness and color. The majority of this is due to diffusion of chemicals in the process inward, and emulsion chemicals outward.
PE
I will definitely get scans of the documentation up. I have tomorrow off (I had to work 3 days this week part retired, part not) I'm formulating next steps. Baby steps as I don't have an unlimited supply.This has been quite a hoot to see. Thanks! I'd love to get a scan of the instructions, I have a thing for the Kodak graphic design.
Yes, almost certainly chrome alum which is a hardener. I have an old bottle.What is the purple hardener (chromium ? ) My biggest concern for disposal is heavy metals.
Best Mike
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