[rollei_list] Re: [rolleiusers] Argomania
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 13 Jan 2010 17:38:42 -0800
----- Original Message -----
From: "Mark Rabiner" <mark@xxxxxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Wednesday, January 13, 2010 2:41 PM
Subject: [rollei_list] Re: [rolleiusers] Argomania
This was the Hunt brothers, sons of H.L.Hunt a Texas
oil tycoon who claimed to have begun his fortune by
winning
a poker game. The Hunt brothers tried to corner the
silver
market and succeeded in driving silver prices up to an
insupportable level. They were procecuted by the
government
and I think may have had to do some jail time. Both
Nelson
Bunker Hunt and his father Haroldson L. Hunt are covered
by
many articles, a Google search will find them. They were
not
nice people.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
Well they took the blacks out of the photo papers. Though
I'd also heard
way later that was maybe not all that true.
The only paper which had any real good old fashioned
printable black left
was Agfa Portriga but that was a warm black. Decidedly
uncool. You had to
try to figure out how to neutralized it. Amidol was one
way. Agfa 130 with
Glycin another in the tray for 5 minutes. And others.
Benzotriazole instead
of Bromide as a restrainer.
Me I just used Agfa Brovira. I believe in bromide.
Then GALLERY Paper came out and they realized people would
pay a few extra
bucks to get some silver in their premium paper. After
that as far as I
went and the photographers I knew Ilford took over and the
Multigrade papers
became viable.
What everyone thought was happening was they'd keep taking
the silver out of
the papers instead of raising the prices on them every
other month. But that
may not have been true. Some other weird thing going on in
paper
manufacture. Its always what you don't think.
Mark William Rabiner
The business of "silver rich" or silver starved paper
was exposed (pardon the pun) by Dr. Richard Henry in his
book. He actually measured the silver content of several
papers and then measured the Dmax they were capable of.
Result: no relation, the richest papers did not have
particularly high Dmax and the lowest silver papers did
pretty well. The Dmax is related to several factors such as
the covering power of the developed silver, which has more
do to with morphology of the crystals than the amount. The
same with film: there have been claims that the T-Max series
of films was developed (no pun intended) to save on the
amount of silver. There is simply no substantiation to this.
Tabular grain emulsions were intended to produce finer grain
with similar sensitivity to conventional cubical grain
emulsions. The difference is mostly in the way the silver
nitrate is introduced to the emulsion. It may well require
less silver but the thinner emulsions result in very much
improved resolution and sharpness (not the same thing) as
well as finer grain for a given speed. There are many other
differences in the T-Max films which are probably not
related to the crystal shape such as much better reciprocity
characteristics than most other films.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
---
Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Subscribe at rollei_list-request@xxxxxxxxxxxxx with
'subscribe'
in the subject field OR by logging into www.freelists.org
- Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
'unsubscribe' in the subject field OR by logging into
www.freelists.org
- Online, searchable archives are available at
//www.freelists.org/archives/rollei_list
---
Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
in the subject field OR by logging into www.freelists.org
- Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
'unsubscribe' in the subject field OR by logging into www.freelists.org
- Online, searchable archives are available at
//www.freelists.org/archives/rollei_list
Other related posts:
