On the brink
Well, two things on the brink really.
1. I have managed to order some samples of the biocide that Kodak uses for preserving gelatin and emulsions. If it works out, then this will allow emulsion keeping and gelatin keeping before coating to be increased by nearly a year or more. This will be a great economical benefit to workers in this area.
2. I have two samples of chemicals coming that will allow me to make my first color coatings. I am preparing to make 3 sheets of C/M/Y coatings on film with proper sensitization, so that I can superpose them and prove the concept. This was how Mannes and Godowsky got started. If it works, the final formula will be in the book. (Well, an outline of a thought experiment is there already, but having the real thing will be better)!!!! Don't you agree?
Anyhow. One emulsion in the can needing about 10 experiments to find out the "sweet spot", one emulsion (t-grain) to make in a few weeks, and the color emulsion when I get the chemicals.
Oh, I have worked up a cubic bromide emulsion and was wondering if anyone thinks that should be in the book as well. Opinions welcome.
I'm still working.
This all sounds fantastic, Ron.
Sounds fantastic. I'm very pleased that you have decided to include the basic concept for color materials.
Cubic emulsions are used in low-speed, very fine grained print films, correct? It might be quite interesting too. Having many choices is a good thing so why not, if you have it ready. It would also demonstrate the differences in making as an example.
What is the current shelf life of the emulsions you are using, Ron? And will this work for plates as well as paper emulsions?
Cubics can have any use you want, depending on size and Iodide content!
Current emulsions keep for a year or so in the fridge and gelatin keeps for about 6 months. The new stabilizer (not Thymol) will extend that by up to a year at minimum. This assumes about 4 - 10 deg C. You should not freeze an emulsion or gelatin in water.
Awesome! Seriously PE, your a hero.
Just wondering, how long lived is the images made from c/m/y as you describe? I wish you the best of luck making it
Thanks, Ron, you are doing a great job.
I will be using an Azo dye, so it will be on the order of Ciba/Ilfochrome. If it works that is! I may fail.
Originally Posted by alexhill
In addition, it will probably have to be coated on film or Yupo (or similar) as they are the only supports that will survive the dye bleach process.
Outstanding news, Ron!
I'd like to see the all of this new work included in the book. Gives us much more to experiment with, for certain. Who knows where this will all lead....
I'd rather see the B&W emulsions finished and any color emulsions could be in Volume II. There's a lot of color theory that should be added to a second volume in addition to just how to make a color emulsion.