I am looking for any information in book, article, www, or contact person regarding the technical side of modern panchromatic b&w film emulsions. I am thinking this would include the time frame from about 1930 to the present. I would like information dealing with the chemistry and ingredients of emulsions, manufacturing of emulsions and the history of emulsion chemistry. Anything to do with history can be comprehenisve, dating from the beginning of photography. The reason for the request is discussed in this on going thread: http://www.apug.org/forums/showthread.php?t=9260 Thanks in advance for any book titles, names, links etc.