it doesn't sound that bad. i'll let you know after i try a few times. After your book comes out of course.
The Azo type emulsion takes less than 1 hour from start to finish, the Kodabromide/Brovira takes about 2 hours, and this emulsion will probably take about 3 hours. Now, that is not dependant on amount, you can make 100 grams or 1 kg in the same 1 hour when you are working on the Azo type emulsion.
This is not rocket science the way I do it, but I will include a chapter on the high end stuff.
For the sake of all things holy, please!!! Keep going!!!!
Originally Posted by Photo Engineer
I'm praying like crazy for the emulsion...
"I only wanted Uncle Vern standing by his new car (a Hudson) on a clear day. I got him and the car. I also got a bit of Aunt Mary's laundry, and Beau Jack, the dog, peeing on a fence, and a row of potted tuberous begonias on the porch and 78 trees and a million pebbles in the driveway and more. It's a generous medium, photography." -- Lee Friedlander
Looking forward to all of the new info!
please "go on", but just what are you going on to?
please explain to those of us who have not been closely following your posts, what are you hoping to achieve?
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You've been ominously quiet for a while now Ron - I thought something interesting must be coming up soon!
ISO 40 raw sounds very promising - 100 when sensitised even more so.
I'll await developments with considerable interest...
Lens caps and cable releases can become invisible at will. :D
Sounds promising, Ron.
For those who haven't been following Ron's posts, he's been working on developing emulsions that people can make at home without exotic equipment or industrial machinery. I've seen results on his Azo-like silver chloride paper, and it's very impressive. There are reasons to choose it over real Azo. An ISO 40 or 100 emulsion could be coated on film base or glass plates and used in cameras. Maybe we're not facing that necessity right now, but it would be good to have people who can coat their own silver gelatin dry plates, if it does become a necessity, and some might have creative reasons for doing it right now, or one might want to coat plates just out of intellectual curiosity.
All of us, emulsion makers and aspiring emulsion makers, are eagerly awaiting Ron's efforts. They are sure to make a significant contribution to the field. But, if you really want to make your own silver gelatin emulsion - either plate, negative, or paper - you don't have to wait.
Originally Posted by tommy5c
The website dedicated to silver gelatin emulsion making , http://www.thelightfarm.com/, has enough information to get anyone going. In addition, there is the excellent book, Silver Gelatin, by Martin Reed and Sarah Jones, along with the classic primary sources, Baker and Wall. The Light Farm literature list gives them, and others, by title and author.
I encourage you (to put it mildly) to give things a try. Ron's efforts will undoubtedly contribute to the speed of the emulsions, and maybe an increased diversity of types of emulsions, but everything you need to get started is already in the public domain. Have fun!!
Denise has said it all and said it well.
I am trying to make a range of emulsions for papers and films that can be made by the low end and mid end enthusiast and also describe in the book the high end of things. Some things will be easy and some things will be hard. Some will be very hard and also expensive.
I want to prevent the sciences involved here from dying out.
A side note
I have not been enthusiastic about doing my own coating or emulsion making.... until Sunday.
Sunday was mini meeting of NY APUGers and a shoot. David brought along the Traveling Portfolio in which Alex Hawley had a print made on Rons' AZO emulsion. I was blown away.
This is a visual testament to making your own and is really seed for the imagination. I will be 'open' to this in the future.