[pure-silver] Re: Agfa APX 100

I usually get better contrast out of Rodinol, but I also use ilfotect-hc
(hc110), D-76 1:1

On 3/29/08, Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
>
> At 09:55 AM 3/29/2008, you wrote:
> >You know FP4 might be a good replacement for APX 100.  I too found
> >Delta 100 flat for my type of work.  But I do not think that
> >anything will replace the APX 100/Rodinal combination.  Just my
> >experience though.  Ten years ago I used D-76 allot but left it
> >because of getting blown out highlights.
>
>
>       Contrast is a matter of development. While there is a
> characteristic contrast range of film due to the distribution of
> crystal sensitivity in the emulsion this is usually not much
> different from one to another pictorial films. One sees it when
> comparing pictorial film to commercial or lith film. If the contrast
> is too low increase development. Of course, exposure must be adjusted
> also. You should be able to get the same contrast index with any
> common pictorial film. The shape of the characteristic curve will
> vary among films and will affect the tone rendition to some extent
> but the only current  film with a curve much different than others is
> Kodak Tri-X Professional film, the one with ISO-320 speed. It has a
> curve with contrast that increases continously with density.
>       I don't know about blown out highlights with D-76. I use D-76
> 1:1 for T-Max films and do not have this problem. I also use Rodinal,
> mostly for sheet film, and have never seen a significant difference
> in tone rendition between the two. Tabular grain films like T-Max and
> Delta tend to increase contrast faster with development time than
> cubical grain films so its possible to get very high highlight
> densities if one is not very careful. Rodinal at very high dilutions
> will produce some "compensation" that is, the creation of a shoulder,
> or low contrast area, for the highlights. But, since "blown out"
> highlights means no detail in them, this is probably even worse than
> normal contrast and high densities because burning in will not help.
>       I've used a fair amount of APX 100, mostly as sheet film, its
> very nice stuff, I liked especially for portrait work.
>
>
>
> --
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
>
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