[ARC5] WW II Aircraft factory pictures

[Richard Knoppow]

----- Original Message ----- 
From: "J. Forster" <jfor at quikus.com>
To: "Christopher Bowne" <aj1g at sbcglobal.net>
Cc: <arc5 at mailman.qth.net>; "Clare Owens" 
<clare.owens at gmail.com>
Sent: Sunday, February 17, 2013 8:57 AM
Subject: Re: [ARC5] WW II Aircraft factory pictures


> That's why the demise of Kodachrome was so lamented. It 
> was a far more
> stable process than the Kodacolor (C-41) process, used in 
> the 'drug store'
> labs for 30 odd years.
>
> -John

     There was  more: Partly it was the color rendition of 
Kodachrome and partly the nearly grainless images.
     All multiple layer color films are very complex but 
Kodacrome got around a problem by putting some of the 
complexity into the processing steps.  Kodacrhome requires 
four development steps while color negative film requires 
only one and modern color reversal film requires two.  At 
about the same time as Kodachrome was released to the public 
as 16mm motion picture film (1935) AGFA in Germany was able 
to produce a "modern" type of color film. However it was 
never made available to the American market.  Quite a lot of 
this film has survived. This is all rather off topic here 
but those interested in the history of color films can find 
quite a lot on the web.
     The demise of Kodachrome was only partly due to the 
general swing from chemical photography to digital or 
electronic photography; Kodak had been trying to kill it off 
for years due to its difficult processing.  Photographers 
who shoot stock photos particularly miss it due to its 
excellent archival properties.
     There was a difference in the method AGFA and Kodak 
used in "sequestering" the dye intermediates used in 
Agfacolor and Kodacolor (not needed in Kodachrome). Both 
methods were used for decades but it appears that the AGFA 
method is the one currently used.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com