From: ken watson (watsok@frii.com)
Date: 01/05/02-08:52:16 PM Z
Charles,
Found Photographic Emulsion by Wall. I already have it scanned in. Just need
to do the reading and spell checking. This is where all the artifacts and
strange conversions of the OCR software show up. I expect it will take until
next Friday, part time, to get the book looking reasonable.
Thanks for the leads
..-----Original Message-----
..From: Charles Steinmetz [mailto:csteinmetz@netexpressway.com]
..Sent: Thursday, January 03, 2002 8:04 PM
..To: alt-photo-process-l@usask.ca
..Subject: Re: emulsion formulas
..
..
..I've made and coated plates for many years. It's not particularly easy if
..you want results
..equal to commercial negative materials, although it's not too hard to make
..plates that give
..recognizeable images.
..
..ISO 125 is a very challenging target, as is panchromatism (or even
..orthochromatism).
..Blue-sensitive emulsions of ISO 5-10 are hard enough for the
..beginner. You
..*will* need to
..sub the plates. You will also work VERY hard to get even coatings that
..aren't full of dust
..and debris. I strongly suggest looking at Jim Browning's coating machine
..plans to see how
..it's done right.
..
..There are so many variables (especially the gelatin) that it's almost
..pointless to give
..specific recipes. Any recipe will take much tinkering before you
..get it to
..work very much
..like it worked for the person who gave it to you. My first copy of Baker
..was passed down
..to me by a Kodak emulsion scientist, and is full of exquisitely detailed
..notes. Even so, my
..results were very different from his. Until quite recently,
..emulsions were
..tuned by mixing
..various lots of gelatin to get the desired speed with a tolerable
..fog level
..(both are strongly
..influenced by minute traces of things -- some known, some not -- in the
..various gelatins).
..Lately, the commercial operators use neutralized gelatin and add the trace
..impurities
..themselves.
..
..Here is a brief bibliography from my bookshelf (this is an update
..of a list
..I posted some
..time ago):
..
..Photographic Emulsion Technique, by T. Thorne Baker
.. 2nd ed. 1948 American Photographic Pub. Co. Boston [1st ed. 1941]
.. This is the single most useful book I've seen, as far as practical
.. emulsion-making is concerned. That said, please do not give the
.. internet photo-book pirate/pimps the >$100 they are asking.
..
..Photographic Emulsions, by E.J. Wall
.. 1929 American Photographic Pub. Co. Boston
.. The second most useful book. Same comment about pricing.
..
..Photographic Chemistry, vol. 1, by Pierre Glafkides
.. 1958 Fountain Press London
.. Part II is an excellent general discussion with recipes.
..
..The Photographic Emulsion, by B.H. Carroll, D. Hubbard, & C.M. Kretschman
.. n.d. Focal Press London & NY
.. A collection of seminal papers from the late '20s and early '30s. No
.. instructions for making emulsions, but lots to help you understand and
.. improve your methods once you are over the beginner's hump.
..
..The Theory of the Photographic Process
.. 1st ed. 1942 Macmillan Co. NY C.E. Kenneth Mees, ed.
.. 2nd ed. 1954 Macmillan Co. NY C.E. Kenneth Mees, ed.
.. 3rd ed. 1966 Macmillan Co. NY C.E. Kenneth Mees & T.H. James, eds.
.. Very technical compendium of all things silver-gelatin. Again, no
.. recipes for the beginner, but most all the public-domain information
.. on silver in one place. In the 1st ed., an excellent discussion of
.. spectral sensitizing occupies Section VI. It's much attenuated in
.. the later editions.
..
..C.B. Neblette has a very basic, but good, overview chapter in the
.. various editions of Photography: Its Materials and Processes (and its
.. succesor, Neblette's Handbook of Photography and Reprography), and in
.. Photography: Principles and Practices
..
..Photographic Materials and Processes, by Stroebel/Compton/Current/Zakia
.. 1986 Focal Press Boston & London
.. A fairly detailed overview chapter. No recipes.
..
..Kodak published a pamphlet with a recipe for slow in-camera film, called
.. Making a Photographic Emulsion, publication AJ-12 (long out of print,
.. but sometimes available by calling Kodak's 800 number -- it depends on
.. the representative you get). Makes a fractional-ISO emulsion.
.. [I have a set of scans I can send if folks just can't find it]
..
.. [I also have scans of 8 pages from another old book, whose
..title is lost
.. in the mists of time]
..
..Aristotypes and How to Make Them, by Walter E. Woodbury
.. 1893 Scovill & Adams NY
.. Paper emulsion recipes, both gelatin and collodion.
..
..Jim Browning has posted his recipes and methods for making dye-transfer
.. matrix film, from which you can learn a great deal.
..
..
..Best regards,
..
..Charles (sorry for the spam below)
..
..
..
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