[pure-silver] Re: Kodak vs Ilford
- From: Bogdan Karasek <bkarasek@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sun, 23 Mar 2008 00:17:26 -0400
Hi all,
snip
Jason McPeak wrote:
snip
On 3/22/08, Richard Knoppow <dickburk@xxxxxxxxxxxxx
<mailto:dickburk@xxxxxxxxxxxxx>> wrote:
snip
Local contrast can also be reduced by the use of
contrast masks. These can be made with a contrast higher
than the negative so that they result in a non-linear final
curve. Contrast masks used to be common in color printing
especially with Cibachrome. They are not too difficult to do
for B&W. Similar effects can be gotten from electronic image
editing programs like Photoshop but many are not aware that
they can be generated photographically albeit with more
work.
Perhaps some elaboration on contrast masks in the analog darkroom??? My
understanding is that it entails burning a certain area while using a
higher contrast filter???
Cheers,
Bogdan
A last word on film curves: I think the best explanation
of their effect is in the older Kodak film databooks. I have
no idea where to find these other than camera swap meets or
dealers specializing in this kind of thing. Its possible
some library systems may have them. The edition is not
important because the same text was reprinted with the film
data sheets tipped in. Its the text you want so having
obsolete data sheets is of no consequence.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>
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I am a leaf on the wind! Watch how I soar.
-Hoban "Wash" Washburn
(serenity movie)
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________________________________________________________________
Bogdan Karasek
Montréal, Québec bogdan@xxxxxxxxxxxxxxx
Canada www.bogdanphoto.com
"I bear witness"
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