Re: Kodak Tech Pan , what rating ?

I'm using it in a pinhole camera and 4x5 cut film. I expose at ISO 25,
then inspection develop (dark green safelight, short peeks)at about 5
minutes or less in HC-110 Dil. B or 1:25 Rodinol, 68F. I have to hold
back the development time, or it is much more contrasty than I might
wish.


Paul W. Ross

On 14 Jul 2003 12:29:45 -0700, (E-Mail Removed) (Paul W. Ross) wrote:

>I'm using it in a pinhole camera and 4x5 cut film. I expose at ISO 25,
>then inspection develop (dark green safelight, short peeks)at about 5
>minutes or less in HC-110 Dil. B or 1:25 Rodinol, 68F. I have to hold
>back the development time, or it is much more contrasty than I might
>wish.

Why not use a more dilute developer ? Most use Rodinal 1:100 for 7 min. @
70F.

John

"Paul W. Ross" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> I'm using it in a pinhole camera and 4x5 cut film. I
expose at ISO 25,
> then inspection develop (dark green safelight, short
peeks)at about 5
> minutes or less in HC-110 Dil. B or 1:25 Rodinol, 68F. I
have to hold
> back the development time, or it is much more contrasty
than I might
> wish.

Do you want "normal" contrast negatives? Technical Pan is
an inherently very high contrast material which will produce
normal pictorial contrast with special developers. Diluting
normal developers won't do although many practice this.
Kodak Technidol is a special, very low contrast, Phenidone
developer, designed to produce both low contrast and uniform
development on Technical Pan. Because Tech Pan has a very
thin emulsion (one reason its so sharp) a special agitation
method must be used to avoid getting blotchy results.
I shoot Tech Pan roll film at around ISO 12 to 25. With
Technidol I get very nice negatives which print without much
difficulty.
One effect you will find is a sometimes odd tonal
rendition due to the high red sensitivity of the film. It
will tend to wash out skin tones unless a green filter is
used. This can actually be flattering to people with
blemishes.
Technidol is expensive but I've never found anything else
that gives really good results with this film.
--

---
Richard Knoppow
Los Angeles, CA, USA
(E-Mail Removed)

In rec.photo.darkroom Paul W. Ross <(E-Mail Removed)> wrote:
> I'm using it in a pinhole camera and 4x5 cut film. I expose at ISO 25,
> then inspection develop (dark green safelight, short peeks)at about 5
> minutes or less in HC-110 Dil. B or 1:25 Rodinol, 68F. I have to hold
> back the development time, or it is much more contrasty than I might
> wish.

I've used C-41 developer
(and the rest of the process regular B&W, fixer! etc.)
with Tech Pan exposed at 25 ISO. It works very well.
If you want the times I used (they are at home) e-mail me by cleaning up
the line below:

--
Sandor Mathe
(E-Mail Removed)