From: Eric Neilsen (e.neilsen@worldnet.att.net)
Date: 06/25/00-10:13:46 AM Z
Steve Shapiro wrote:
> Now, we're finally getting to the heart of the matter.
>
> I have a Kodak density sheet that tells the contrast range for silver
> gelatin, grades of papers.
>
> 1= 120- 95
> 2= 95- 80
> 3= 80- 65
> 4= 65- 40
> 5= 40- 30 and 30 is unprintable.
>
What developer? What happened to 0?
> Mostly, base + fod is 17 to 12 min.
>
> Now: What I would like to know, by guess, experience or extimate; what are
> the print ranges for Pt/Pd i.e.drops [recommended] for each density
> measurement?
>
> Steve Shapiro, Carmel, CA
Steve, you will need to include too many variables for this information
for an
across the board answer. The combinations of chemicals sources,
concentrations,
light sources, humidity ranges and paper give a big change in speed and
contrast. It could be done for a specific user and/or set of variables
but not
all pt/pd printers work the same. DOP, POP, DOP/POP. Jeffrey had it
right.
Learn by seeing and adjusting your eyes to your process. Absolutes work
in a
closed environment but not so well in pt/pd printing.
"i.e.drops [recommended] " of what? contrast agent(s)? Pt vs. Pd ? FO
to Pt/Pd?
?????
-- Eric J. Neilsen 4101 Commerce Street, Suite #9 Dallas, TX 75226 214-827-8301 http://e.neilsen.home.att.net http://www.ericneilsenphotography.com
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