Re: Konica Base fog

["phillip geller" <filje@xxxxxxxxxxx>]

Subject: Konica Base fog


> To the group,
>
> I just ran some Konica 750 tests in a new 120 rollfilm camera. I processed
> similar rolls of film in D-76 1:1 for 8min @ 68*F, and Rodinal 1:50 for
> 7min. Both rolls looked good - images came out with the same film speed!
But
> both rolls showed fairly high base fog; slightly grey. Is this usual, or a
> problem with 1yr outdated, but refigerated film.
>
> For the tests, I used a 25a filter, and got good results. On a few frames,
I
> used a Tiffen "orange" filter, but got no speed increase over the 25a.
>
> What is the Wratten equivalent to the Tiffen filter, and has anyone found
> and advantage to using it over the 25a?
>
>
> Stan Patz   NYC

Hi Stan.
I have some of the same film. I ran both 135 and 120. They are both
considerably more
gray than the last batches. I think it's a quality control problem. Either
that or
the whole batch was improperly stored.
Batch 3/2000  127.

I compare that to a 1997 batch that I just ran out of and it's a whole lot
darker.
Know any good formulas for low base fog developers?

Phil



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