Re:Konica 750nm Processing Time

[Clive Warren <Clive.Warren@xxxxxxxxxxxxx>]

At 4:26 pm -0400 7/7/99, Gary Beasley wrote:

>>Date: Tue, 6 Jul 1999 21:46:29 -0400
>>From: "George L Smyth" <glsmyth@xxxxxxx>
>>Subject: RE: Konica 750nm Processing Time
>>
>>> -----Original Message-----
>>> From: owner-infrared@xxxxx [mailto:owner-infrared@xxxxx]On Behalf Of
>>> Gary Beasley
>>> Sent: Tuesday, July 06, 1999 5:55 PM
>>> To: infrared@xxxxx
>>> Subject: Re:Konica 750nm Processing Time
>>>
>>> Even in Laurie Whites book on Infrared it shows Konica as very contrasty.
>>> When I tried it at the recommended times in D-76 I got hard to print
>>> results. For that reason I experimented and found out Technidol works well
>>> at the same specs as Tech Pan film.
>>
>>This is the reason I looked at Rodinal and shoot Konica so slow.  Technidol
>>is an excellect alternative to Rodinal.
>>
>>george
>>
>>- ---
>>HandMade Photographic Images
>>http://www2.ari.net/glsmyth/
>>
>One thing that may win you over though is shooting at an EI of 25 (with an
>unfiltered hand held incident meter).  I forgot to mention that.
>Gary Beasley
>http://beasleyglb.home.mindspring.com/


Gary,

I guess then that Technidol is one of the Rodinal type developers but
increases the effective film speed through increased action of the
developer on the shadow areas. This would account for the greater range of
midtones using these developers.

It seems that Rodinal does not increase effective film speed from the data
available, however it also produces a better range of midtones.

Hmmm - it's the empiricist coming out in me again, maybe better to simply
accept the results and do more printing rather than worry about it too much
:-)


All the best,

              Clive   http://www.cocam.co.uk


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