From: Richard Knoppow (dickburk@ix.netcom.com)
Date: 01/03/02-03:22:02 PM Z
At 03:08 PM 01/03/2002 -0500, you wrote:
>There was a thread a few days ago about making your own emulsion.
>
>I found some formulas for photographic emulsions at
>http://artnavigator.tripod.com/emulsions3.htm
>
>I think there was a web page at Kodak about this also, but have been
>unable to find it again.
>
Many years ago Kodak published a formula for a general purpose slow
emulsion. I don't have a copy and don't remember where it was published,
probably in a brochure.
There are two old books which are the standard texts on emulsion making
and which have practical formulas. Both are hard to find but a good library
should be able to get them.
Most emulsion making technique, at least until pretty recently, was
shrouded in great secrecy. Patent protection has been much more widely used
in the last twenty years than in the past but I suspect much of the actual
technique is still considered proprietary.
The two old books are:
_Photographic Emulsions_ E. J. Wall, 1929, Boston, The American
Photographic Book Publishing Co.
_Emulsion Technique_ T. Thorne Baker, 1941, Boston, American Photographic
Book Publishing Co.
There is also a second edition of the above, 1948, same publisher.
A more recent book is:
_Photographic Emulsion Theory_ George F. Duffin, 1966, The Focal Press
A cursory search of the on-line catalogue of the Los Angeles City library
shows a number of more recent books treating directly on emulsion
chemistry. I know of at least two translated from Russian published by
Focal Press. I suspect the University of California libraries have more.
Books like _Theory of the Photographic Process_, C.E.K. Mees, have
descriptions of the basic process and chemistry but have little detail.
Mees and T. H. James were employed by Kodak and had knowledge of
proprietary processes. Mees make clear that he can't go into details.
Modern emulsion making may be very much advanced over the techniques
described in these books. Some hints can be found in patent literature, but
its a long search. I think for simple demonstration purposes, or simple
applications Baker or Wall will prove useful.
---- Richard Knoppow Los Angeles, CA, USA dickburk@ix.netcom.com
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