Response to Anyone dialed in TMX 120 with PMK? got a free brick...

I have measured the true film speed of TMX using a calibrated color transmission densitometer on film developed in PMK. The speed (0.1>B+F) is 64. I measured the proper development time (zone VIII on the 11 zone scale per AA) as 15M@68F. Using John Placko's temperature conversion chart, this relates to 13.5M@70F, very close to Ed's time. These negatives print on grade 2. If you are getting unusually contrasty negatives, either your temperature is not controlled well, your timer is running slow, or your dillution is incorrect. TMX/PMK is an excellent combination; it would be worth the effort to sort out you problem.

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