Re: [APML] TP for terrestrial work

[Grant <GB1029@inter-linc.net>]

Any comments on using hypered tp for daytime work
processed in technidol? Does the hypering
increase speed for daytime use as well?
Any unwanted effects?

Faster tp for daytime use would be nice.

Grant

At 07:39 AM 7/10/02 -0400, you wrote:
>-snip-
>
>         Tech pan is strange stuff, and not only do most labs not knwo how 
> to process it, but most people don't knwo how to shoot it daytime or nighttime.
>         Also, most commercial labs will butcher tech pan 
> processing.  heck most labs cannot even process any plain old B&W film 
> anymore, let alone tech pan.  Mind you, I am biased, as I do cusotm 
> processign for a fee, so i am not totally indifferent here.
>         Anyhow, to processs tech pan, dyatime shots, at home, do the 
> following...
>         1) expose at 25 ASA/ISO.
>         2) use a spot meter, or meter off the shadows in your daylight 
> scence, and expose for the shadows.   When shooting colour film in 
> dyalight, you use and incident light meter - you meter the "light in the 
> air" so to speak.   But for any B&W film, you meter the 
> light  *reflected* off a surface, not the incident light.  Metering 
> incident light will always underexposre your B&W film.  Never worry about 
> over exposing B&W film, I find almost every brand of B&W film works best 
> overexposed and then you compensate for development.  Example, I'll shot 
> Tri-X at 100 and 200 ASA on a regular basis.
>         3) Do not use D-19 for daytime shots, it is a vey high contrast 
> developer,a nd almost any B&W film will come out lookign liek 
> lithographic film.  stay away form HC-110 and tech pan too, it can be 
> done, but I do not like the results.
>         4) Use technidol for extremely fine grain - such as repro work, 
> but plain old D-76 or Xtol will work fine on tech pan
>         5) follow the agitation instructions carefully with tech pan
>         6) wheever possible, use distilled water for your developign 
> solution.  Developers are constantly being reformulated a little bit here 
> nad there - or so it seems to me - moslty to comply with envirmental 
> standards, etc.  I find variations in the quality of tap water plays 
> havoc with soem developers.  Xtol is horrible that way.  So use distilled 
> water to mix up your base developer - this includes your D-19 and hypered 
> tech pan.  It just removes one more variable form the entire processing 
> system, and allows greater consistancy.
>
>         That's about it.  It is neat stuff.  Finally, because of the 
> extended red sensitivity, tech pan has a different look to it than say 
> Tri-X or HP5.  That is part of it's charm
>joe


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