RE: [APML] Dynamic Rnage (was TP High Vac Hypering)

["Jeff Ball" <jeffball@netacs.net>]

Hello Chuck,
I am now planning my June photo run.  I have two weekends committed to AP.
Can't miss, right?  Thanks for pointing out the Wallis M8.  I am chomping at
the bit to use some hyp. TP I have ready.  I noticed that Wallis wrote this
about developers:

HC-110 dilution B can be used on Hypered Tech Pan. A processing time of 16
min @ 21 C is useful. Tech Pan that is processed in HC-110B will be slightly
( ~10-15% ) slower than films processed correctly in D-19. TP 2415 processed
in HC-110B will have a much longer dynamic range than when processed in
D-19. MWP-2 is not recommended for the processing of Tech Pan astro negs.
While MWP-2 worked well for old 103a type emulsions, it yields a speed that
is about 1/2 of the speed obtainable using either D-19 for > 10 min or
HC-110B.

Any thoughts on the benefit of using HC110B on these highly dynamic objects
like M8?

Chuck wrote:
Brad Wallis has an example of M8 developed in Technidol if you have
not seen it before:

http://voltaire.csun.edu/m8bw.html

Chuck <aa6g@aa6g.org>



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