Re: [APML] Properly Exposed TP

[Aplanatic@aol.com]

> I resized the E200 graphic width, flipped it 
> and pasted it onto the TP graph and the slope 
> of E200 is much less than the slope of any 
> of the TP curves. I'd guess no more than 
> 2.0. TP developed for 10 minutes could approach 
> 4.0. That's a big difference.

Chuck, you're post agrees pretty well with my sensitizing experiments.  TP developed in D19 for 10 minutes, when hypered to 0.4D, shows a gamma of about 3.5.  When developed for 8 minutes it shows a gamma of about 3.3 (and a base fog of about 0.35D).  In both cases above the film was low-vac hypered for 90 hours at 49 degrees C.  I would expect that gamma would be even higher for "harder" hypering, or should I say "hyper-hypering".  :)

You make an interesting argument about hyper fog and contrast, but I don't exactly agree with your statement (just a semantic issue, perhaps).  The toe of the characterist curve is still present in "harder"-hypered TP, it just moves to a lower exposure level.  Maybe that's your point.

Dave Rowe







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