----- Original Message -----
From: "Collin Brendemuehl" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: July 18, 2001 8:11 AM
Subject: OT: Paper Results
> I did a little test between some 25 year-old
> fiber (ektalure) and new, fresh RCIII. Shot
> was on Tri-X 4x5, exposed & processed normally.
> About 1/3 sec @ f32.
> Enlarging lens is an Kodak 161mm.
>
> Here's the differences:
> Ektalure print scan
> image used for comparison:
http://members.iol21.com/dpconsult/Scan1.jpg
> 600 dpi scan, Ektalure:
http://members.iol21.com/dpconsult/Scan2.jpg
> RCIII :
http://members.iol21.com/dpconsult/Scan3.jpg
>
<I just snipped all of it, I can't make any sense of
photochemistry at the best of times anyway>
I'm jut going to look at the pictures.
I quite like Scan1, but it is a pity about the log in the bottom
left. You either need more of it or none of it. I'm not sure
which. The guy stting down needs a beer.
Uhhh, what grade of Ektalure (not that any of them will be all
that contrasty, what grade of RCIII?
Well, here's whats happenning.
Ummm. presuming yer Ektalure is still any good.......
Ektalure is a bromide paper, RCIII is a chloride paper.
Bromide papers are finer grained but warmer toned than chloride
papers.
Well actually, warm toned papers are bromide, Cold toned papers
are chloride, and most are some variation of chloro-bromide,
usually more chloro than bromide, I think.
The Ektalure may be a bit fogged from age, but it hasn't the
cleanest white when fresh either.
Ektalure doesn't really come into its own until it has been
selenium toned to set the blacks.
The RCIII has a cleaner white and a deeper black from the start,
but won't react to selenium toning as dramatically.
RCIII has a longer tonal range, but poorer tonal delineation
than Ektalure.
Imagine it like this:
The Ektalure has X number of discreet tones available from Zone
II to Zone VIII.
The RCIII has X number of discreet tones available from Zone 0
to Zone 10.
I was hired by the Provincial Archives a few years ago to print
some very old negatives. The paper specified was Ektalure G
surface, Selenium toned 1:3 for twice the time to end of visible
tone change. Final 2 rinses in distilled water. They wanted em
stable, as this was the last time they wanted to print these
negatives.
This turns out to be one of the most beautiful papers I have
ever used.
The negatives I was given were 8x10 nitrates, The pictures were
of American Indian Chiefs from when the treaty's were being
signed with the various Indian bands in this part of North
America. I suppose this would date them to around 1890, give or
take a decade.
All I had to do was contact print the things, and keep all
sources of ignition away from them.
I made a set of prints for my father, as this was a period of
Saskatchewan history that he was a student of, and his eyes
reallu lit up when I told him about this job.
I should probably see if my Mom knows where they are.
The prints were quite lovely.
William Robb
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