Martin, thanks for your reply. According to Kodak's tech support, the symptom of too much PhotoFlow is a residual scum on the film -- which I do not have. The differential drying marks which I am getting are, according to Kokak and Agfa, a classic symptom of too little PhotoFlow or LFN. However, I have increased the concentration of PhotoFlow up to 3 times Kodak's recommendation, but I still get the marks -- which are the result of differential rates of drying for the contiguous areas of film (the wet film is swollen, as it dries it reduces -- but because there are wet spots surrounded by dry areas on the emulsion side of the film, the reduction is differential.)(posted 8741 days ago)If you hold the emulsion-side of the film against the light just right, you can see the "step" which is the edge of the drying mark -- the drying mark is togographically different than the adjacent film, and prints as a white outline. On the non-emulsion side of the film, there is a small indentation or dimple, where the substrate is buckled due to the stress caused by differetial drying of the emulsion.
What's curious to me is that I do not have this problem with TMAX -- only with Agfa. I asked Agfa what might cause the difference -- they pointed out that the emulsion layer of Agfa film is thicker than that of Kodak, but did not understand how that might contribute to these drying marks.