[largeformat] Intro date of Kodak's Series filters

[Les Newcomer]

Thanks Richard, but the Wratten and Wainright  filter screens were 
usually square, and came in at least two grades, I have  set of 4x4 B 
grade series in a nice leather box and they are still quite good 80 
years later.

What I'm trying to find out is if it's chronologically correct to have 
a Series VI lens hood on a 1937 Pre-Ann.


I loved the part about the name of the dyestuff permeating the name of 
the filter an you give me the name of any particular dystuff that did 
that?

LEs




On Oct 24, 2005, at 10:36 AM, Richard Knoppow wrote:

>
> ----- Original Message ----- From: "Les Newcomer" <LNPhoto at twmi.rr.com>
> To: "f32" <largeformat at f32.net>
> Sent: Monday, October 24, 2005 6:47 AM
> Subject: [largeformat] Intro date of Kodak's Series filters
>
>
>> Does anybody have a firm date of when Kodak introduced their Series 
>> line of Wratten filters?
>>
>> The earliest I can find is in the 1940 Graphic Graflex Photography.  
>> Can anybody find an earlier date?
>>
>   Wratten filters predate the purchase of Wratten & Wratten by Kodak 
> c.1912. Wratten was the company in which C.E.Kenneth Mees was a 
> partner. Kodak bought out W&W to get Mees, who organized and ran the 
> Kodak Research Laboratories until his retirement c.1960. Wratten & 
> Wratten, through Mees, had a relationship with the predominantly 
> German makers of dyestuffs. They had a reputation for superior film 
> sensitization using dyes and for the filters.
>   In some cases the letter designations for Wratten filters come from 
> the names of the dyes used in their composition (for instance K 
> series).
>   For a long period, decades, Wratten filters were made by the small 
> manufacturing division within the Kodak Labs as were special purpose 
> plates such as metalographic, spectrographic, and astronomical plates. 
> Eventually filter production was moved to a regular manufacturing 
> plant. A few years ago Kodak sold the Wratten filter operation to 
> Tiffin.
>   As was often the case when George Eastman bought a company he left 
> is management in charge and used its original trade names, hence 
> Wratten filters and some W&W plates.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk at ix.netcom.com
>
>
> _______________________________________________
> LargeFormat mailing list
> LargeFormat at f32.net
> http://www.pairlist.net/mailman/listinfo/largeformat
>