[rollei_list] Re: The end of Kodachrome?
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Fri, 31 Dec 2010 21:13:17 -0800
----- Original Message -----
From: "CarlosMFreaza" <cmfreaza@xxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Friday, December 31, 2010 8:12 PM
Subject: [rollei_list] Re: The end of Kodachrome?
2010/12/31 Richard Knoppow <dickburk@xxxxxxxxxxxxx>:
Kodachrome is basicallly a B&W film, which is developed
in special color
developers.
Ed Meyers
...True but also true of all color films...
The excellent 35mm B&W and colour images (Kodak Retina and
Contax)
published in the books "The Ascent of Everest" by John Hunt
and
"Alfred Gregory's Everest", 1953 Everest expedition head and
photographer respectively, are all Kodachrome Asa 10 shots,
these
rolls were processed by Kodak directly and then no problem
for the B&W
Kodachrome. Hillary's image about Tenzing on the summit of
Everest is
shown in color, but there are Kodachrome B&W versions too.
Gregory's
photographs taken with the Rolleiflex were "true" B&W,
Panatomic X
rated ASA 25.
I developed some Agfa Scala B&W slide film as if they were
APX 100,
results were similars being the Scala more contrasty
slightly, since
this was a B&W slide film, no problem with colors hue.
Carlos
PS:Happy New Year to all!
Happy New Year to all, I get to spend it at work but
usually someone will dole out small amounts of cheap
champaign.
Most reversal films were intended for direct viewing or
projection. The exceptions are films intended for
duplicating negatives. For direct viewing or projection one
wants rather high contrast in comparison to a negative.
Also, reversal films must have the full range of densities
from clear support to whatever the emulsion is capable of.
When developed to a negative these films tend to be high
contrast although they can be developed to lower contrast.
That changes the effective speed and the developer type may
need some adjustment. I have never tried to develop
Kodachrome as a monochrome film but have heard reports that
D-76 is satisfactory. Probably any standard negative
developer will work.
I doubt if anyone will try independant color
development, the chemstry is too specialized and the process
is very critical. Kodachrome is somewhat unusual because in
most films the difficult part is in the manufacturing. The
processing is usually made as simple as possible so that the
end user can do it adequately. Kodachrome is somewhat the
opposite; although not easy to make by any means it is very
much simpler than modern color films but has a much more
difficult development process. Modern color films are just
about as simple to develop as black and white. The only
place they are more critical is in temperature control of
the developer for negative films and first developer for
reversal films. Reversal films are probably more critical
than negative films because the first development determines
the contrast and density range of the final transparency
with little ability to correct it. For the same reason they
are much more critical of exposure than negative films.
I am sorry to see Kodachrome go, no other film looks
quite the same and it evidently still has the best longevity
in dark storage.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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