I thought I would post some data for discussion - if anyone is interested. This is part of a low-flare/no-flare test of 35mm Delta 100 in PMK. One of the purposes is to try for some cold hard yes/no answers to questions like: -Is imagewise stain pH sensitive post development? -Does imagewise stain intensify if a post-fixer alkaline bath is used? -Does an extended wash intensify imagewise stain? Rather than test one variable at a time, I wanted to first try an all-out "ideal" treatment ("control") versus a rule-breaking treatement ("pressure"). If there was any significant difference observed between the bookend scenarios, I'd continue investigating the variables. The development regime was the same in both treatments. All solutions were mixed with distilled water (with the exception of running wash water). Standard PMK dilution. All solutions and running wash water were at 22C. Post-development as follows: Control -1 minute running water rinse -5 minutes in TF-5 fixer -2 minutes in spent developer -30 minute wash Pressure -30 seconds in Kodak Indicator Stop Bath at standard dilution (16ml/l) -5 minutes in Ilford Rapid Fixer -10 minute wash Densities were read with a black and white densitometer to determine "visual" readings. Since I don't own a color densitometer, the "blue channel" readings were then made using a Wratten #47 filter. The results are attached. As expected, the silver densities appear to be virtually identical with the possible exception of a very small amount of additional density in the low values in the "control" scenario, which is either simple experimental/measurement variability, or a very small amount of compensating development occuring in the water "stop" bath. As for the stain measurements, it is fair to say I am confused. To be honest, what I expected was either no significant difference at all, or a difference in general stain only. Key stain observations 1. Base fog (visual and blue) were the same 2. "Control" scenario shows more film speed and shadow density from stain 3. Beyond the zone IV exposure, the increase in stain in the "control" scenario relative to the "pressure" scenario is essentially constant, rather than proportional Observations (1) and (3) above would appear to contradict eachother to some extent. The conditions in the "control" scenario seem to add some imagewise stain (ie proportional, contrast-increasing stain) up to a point - the zone IV exposure, after which there is no further increase in contrast. How can this be?