Just an observation: I have the original Howard Bond article, "Black-and-White Reciprocity Departure Revisited," and in it, Bond states clearly that Kodak provided him with sheet film. Since 400TX does not come in sheets, he must have tested the 320TX, not the 400-speed-roll-film version that seems to be mentioned everywhere in the thread. Unfortunately, the usually careful Bond only identifies the film he tested as "Tri-X," with no other details. Since it was sheet film he was testing, however, we must assume that it was the 320 version and, therefore, revise all the earlier references to "400TX" in this thread to read "320TX."

Nevertheless, this is a fine thread with much useful information.


Doremus Scudder