[QUOTE=Photo Engineer;1252719]I have to credit Mark Osterman for getting me to move on this one.

I would have loved to have been a "fly on the wall" durring your conversations with Mark. I attended A.P.I.S. in September and had A conversation with France. Mark has had some experience with dye sensitization of Collodian. Not only with wet plate, but with dry plate collodian. I have done only library research on both. Perhaps you,PE, should ask Mark to join this Forum.