[pure-silver] Re: Question on Contrast Masking
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 03 Jan 2005 19:36:44 +0100
First, figure out what exposure reduction you require. Let's say two stops.
Then, you need to expose and develop the mask to give you a negative density
range equivalent to two stops (0.6).
If you already have made a film exposure and development test for your
favorite film (highly recommended), this is simple. If not, trust the
manufacturers info in their technical literature. In any event, a
densitometer is a very useful tool for this.
If all else fails, try to experiment and start with modest exposures and
short development times in normal developers.
To start with the subject, you may download a free chapter of our book 'Way
Beyond Monochrome' from
www.darkroomagic.com
You'll find it as a pdf in the Book section.
Regards
Ralph W. Lambrecht
On 1/3/05 6:59 PM, "Sauerwald Mark" <mark_sauerwald@xxxxxxxxx> wrote:
> The discussion on split grade printing has been great
> - thanks all. I hope that I can get another
> discussion like that going!
>
> I have a negative which I believe calls for a contrast
> mask, which I have never done. The image is of a
> footpath, under dense tree cover, with very intersting
> roots on the ground. Through a gap in the trees, you
> can see a lake with the far shore. When I print this
> now, I give the footpath a 12s exposure, then burn in
> the lake and far shore with an additional 60s exposure
> - this gives me nice detail on the water surface and
> far shore, while still keeping detail in the dark
> sections on the footpath.
>
> Problem is that when I burn in this much, it is near
> impossible to maintain detail on the small parts of
> trees that are silhouetted by the lake, and the near
> shoreline shows the edge of the burn clearly, and I
> never get it exactly right.
>
> As I understand the technique - I would sandwich the
> negative with a piece of film, and expose then develop
> the film - then sandwich the negative, with the
> positive mask for the final enlargment. - Question
> is, how do I go about figuring out the exposure and
> development for the mask, and what film should I be
> using? - If it makes a difference, the neg is 4x5 on
> Tri-X.
>
> Mark
>
>
>
>
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