Archived posting to the Leica Users Group, 1999/05/11

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Subject: Re: [Leica] RE: Kodachrome Valley
From: "Dan Post" <dwpost@email.msn.com>
Date: Tue, 11 May 1999 11:55:22 -0400

Mark- the bleach and fix of any color process removes all silver, leaving
only a dye image.
- -----Original Message-----
From: Mark Rabiner <mrabiner@concentric.net>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: Monday, May 10, 1999 8:00 PM
Subject: Re: [Leica] RE: Kodachrome Valley


>Jim Brick wrote:
>>
>> If my feeble 5th sense serves me correctly...
>>
>> The last time I checked, Kodachrome was still a B&W film, with real
silver
>> grain, and the color added in the processing. The result is a film with
>> "real" silver grain.
>>
>> Provia is an E6 film, where the color is within the film emulsion.
>> Processing completely strips away all silver, it having been replaced
with
>> color globules.
>>
>> So in reality, Kodachrome will have grain and Provia will have globs. I'm
>> not sure that they can be scientifically compared.
>>
>> Jim GO5 Brick
>>
>Is the silver still in the film after processing or would that make a
difference?
>Mark Rabiner