Re: Konica IR Development

[Joshua_Putnam <josh@xxxxxxxxxxxx>]

barch@xxxxxxxxx writes:

>Does anyone have a good development and general exposure for
>Konica IR film?  

I generally stay pretty close to the exposure guideline in the
film datasheet, 1/60 @ f/5.6 or equivalent in bright daylight.
(Usually that ends up being something like 1/8 at f/16 or slower
when I'm doing landscapes.)  

As for development, I'm a D-76 person -- use it for almost
everything except Tech Pan.  The "standard" developing time at
20C for D-76 is 6 minutes, and I find that works pretty well.
(A confession: I don't have water bath temperature control, so I
still use the old development dial calculator in my Kodak B&W
dataguide for determining development times when my unheated
darkroom doesn't happen to be 20C.  This seems to work well
enough for Konica 750, at least for chemicals above 12C.)


One thing I haven't tried but may get around to this spring or
summer: the characteristic curve for Konica 750 developed a bit
longer than standard in D-76 looks very similar to that of Tech
Pan developed in D-76.  (Can't remember the times for each
curve, but I plotted the two over each other and they were a
pretty close fit.)  Like Konica 750, Tech Pan gives high
contrast for pictorial use if developed in standard developers,
so Kodak sells Technidol, a lower-contrast, very fine grain
developer.  One of these days I'll have to test Konica 750 in
Technidol.  Has anyone else tried this?  Does it give lower
contrast with good resolution?

- -- 

 Josh@xxxxxxxxxxxx  is  Joshua Putnam / P.O. Box 13220 / Burton, WA 98013
                       "My other bike is a car."                   
                     http://www.wolfenet.com/~josh/
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