My God it Works!
Dear All Gelatinoids,
I've been reading these posts for some months now and have finally managed to make my first glass plate negs, using Osterman's emulsion formula from the Lightfarm website. It's still very slow (3 min exposure f/16, lots of reciprocity failure taking place I'm sure) and a bit foggy, but for the first batch I'm delighted.
Here's my first (and only) image so far.
(see attached image)
I developed this for 20 minutes in D-76 1:1-ish, and am wondering if that is the best developer for the purpose. I don't quite have all the ingredients for mixing my own developers yet.
All your discussions made this a much clearer process and I appreciate all you are doing to bring all this knowledge into the light (dang – now it's exposed...)
J. Miller Adam
Congratulations. That same formula is posted here somewhere. It includes some of Mark's photos as well. It is a very nice emulsion that we estimate to be about ISO 3 - 6. It may include some comments about increasing speed. I forget the actual post, but if you want more information, let us know here. I think we can get the speed to the 12 - 25 range.
Keep up the good work.
Congrats, nice first image!
I believe that all glass plate negative work should be discussed on the HybridPhoto site because like a digital camera if you don't like the image result you can just bleach off the plate and recoat it.
BTW: Nice work.
Last edited by Denis K; 11-11-2009 at 02:27 PM. Click to view previous post history.
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How about pouring hot slurry over a digital camera? My 5x7 plate camera that I use to evaluate emulsions was in much better condition when I bought it. And my 4X5 Press Camera that I took to a Collodiun Workshop has never been the same
Absolutely outstanding! It looks to me like D-76 worked well for you. You could try different dilutions when you have enough plates to play with.
I'm looking forward to seeing all your upcoming successes. Thank you for sharing your results.
Congratulations! Contrast seems very good and coating is uniform. It's perfect. Keep on experimenting!
Congratulations on your excellent results! The photograph looks great.
The excellent book "Alternative Photographic Processes" Second Edition has a section written on the Osterman emulsion making formulae/process. It also has a brief section on a suggested developer to suit. The article says that Dektol has been used effectively for processing the emulsion. It also mentions a D-49 developer.
I highly recommend the book, it has a lot of great information. Perhaps your local library can source a copy?
Originally Posted by J. Miller Adam
Your input is very valuable.
What is the simplest way to increase the speed of this emulsion?
Originally Posted by Photo Engineer