Archived posting to the Leica Users Group, 1998/09/04

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Subject: Re: [Leica] Re: Agfacolour fading
From: Eric Welch <>
Date: Fri, 04 Sep 1998 07:18:01 -0500

At 09:29 AM 9/4/98 +0000, you wrote:

>I've recently been looking through a collection of slides taken in the
>early-to-mid sixties on Kodachrome and Perutz reversal films. All the
>transparencies which had been left in card or plastic mounts still had
>excellent colour, but those which had been bound between glass were
>badly faded.

The films that faded fast were in the 40s. By the 50s, they had started to
fix that problem. (Ektachromes too). In fact, in the 50s, one way to get
faster film (the Denver Post pioneered this) they used to process slide
film in negative chemistry. They got real contrasty pictures, but for
letterpress presses, it was acceptable.
- -- 

Eric Welch
St. Joseph, MO

The world's full of apathy, and I don't care.