[ARC5] WW II Aircraft factory pictures

[Bob Macklin]

And I wish I had a scanner that can scan 6X6 slides.

In the late 60's I was into hydro racing. I have two boxes of slides from 
the period I would like on my computer. I guess I will have to take them 
someplace to get scanned.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "J. Forster" <jfor at quikus.com>
To: "Bob Macklin" <macklinbob at msn.com>
Cc: "Richard Knoppow" <1oldlens1 at ix.netcom.com>; "Christopher Bowne" 
<aj1g at sbcglobal.net>; <arc5 at mailman.qth.net>; "Clare Owens" 
<clare.owens at gmail.com>
Sent: Sunday, February 17, 2013 12:54 PM
Subject: Re: [ARC5] WW II Aircraft factory pictures


> Yes, it makes very nice 6x6 slides.
>
> -John
>
> ===================
>
>
>
>> I got on to Ektachrome when I was using 120(6X6) TLR cameras.
>>
>> Bob Macklin
>> K5MYJ
>> Seattle, Wa.
>> "Real Radios Glow In The Dark"
>> ----- Original Message -----
>> From: "J. Forster" <jfor at quikus.com>
>> To: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
>> Cc: "Bob Macklin" <macklinbob at msn.com>; <jfor at quikus.com>; "Christopher
>> Bowne" <aj1g at sbcglobal.net>; <arc5 at mailman.qth.net>; "Clare Owens"
>> <clare.owens at gmail.com>
>> Sent: Sunday, February 17, 2013 12:00 PM
>> Subject: Re: [ARC5] WW II Aircraft factory pictures
>>
>>
>>> My belief has always been that Ektachrome was the better film for
>>> natural
>>> color rendition. IMO, Kodachrome produced "WHAM, POW, SOCK" cartoon-like
>>> images.
>>>
>>> YMMV.
>>>
>>> -John
>>>
>>> ======================
>>>
>>>
>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Bob Macklin" <macklinbob at msn.com>
>>>> To: "Richard Knoppow" <1oldlens1 at ix.netcom.com>;
>>>> <jfor at quikus.com>; "Christopher Bowne" <aj1g at sbcglobal.net>
>>>> Cc: <arc5 at mailman.qth.net>; "Clare Owens"
>>>> <clare.owens at gmail.com>
>>>> Sent: Sunday, February 17, 2013 9:48 AM
>>>> Subject: Re: [ARC5] WW II Aircraft factory pictures
>>>>
>>>>
>>>>> My memory of Kodachrome says that Kodachrome was only
>>>>> processed by Kodak labs?
>>>>>
>>>>> I have been using Exctachrome for slides for may years.
>>>>> Still have 6 rolls in the fridge.
>>>>>
>>>>> Bob Macklin
>>>>> K5MYJ
>>>>> Seattle, Wa.
>>>>
>>>>      Kodak originally processed Kodachrome only at the
>>>> factory at Rochester, N.Y. After about a year a simpler
>>>> method of processing was devised and Kodak established
>>>> processing stations in other cities.  I think eventually
>>>> there were about four.  Sometime in the 1960s (by memory)
>>>> Kodak was sued for restraint of trade because they included
>>>> the cost of processing in the price of the film. They had to
>>>> stop this practice but at about the same time begain to
>>>> license independant laboratories to process Kodachrome.
>>>> Kodak supplied the machinery and chemistry since, even with
>>>> simplification of the original proces, it was still complex
>>>> and difficult to control.  Kodak had a vested interest in
>>>> maintaining the quality of the results so was pretty careful
>>>> about the independant processors.  Kodak also continued to
>>>> process the film in their own labs.
>>>>      Kodachrome is a three layer film but the "couplers" or
>>>> dye intermediate chemicals are not included in the layers.
>>>> This was because Kodak could not find a way of
>>>> "sequestering"  them to keep them from wandering into the
>>>> wrong layer.  So, the couplers were put into the reversal
>>>> developers.  The film was developed to black and white
>>>> silver images in all three layers then re-developed in three
>>>> separate reversal baths to generate the color, the silver
>>>> being removed after processing.  It was the method of
>>>> insuring the right color would appear in the right layer
>>>> which was changed from the early to the later processing
>>>> method.  The original method, which  I beleive was used only
>>>> for about a year, required the controlled penetration of a
>>>> bleach into the developed film.  After the initial B&W
>>>> processing the film was developed again in a bath with the
>>>> coupler for the bottom layer, this produced color dyes in
>>>> all three layers. It was then floated on a bleach bath which
>>>> bleached the color out of the top two layers then developed
>>>> again in a bath with the coupler for the center layer. Then
>>>> the top layer was bleached out and developed with the proper
>>>> coupler for the color there. In between these steps the film
>>>> was washed and _dried_. The drying was done to control the
>>>> rate of up take of the bleach bath.  After about a year
>>>> another method was devised; this one used differential
>>>> re-exposure and made use of the remaining color sensitiivty
>>>> of the layers.  It still took three re-development baths but
>>>> the bleach steps were eliminated.  After this method as
>>>> adopted Kodachrome became available in many formats other
>>>> than 16 mm film.  Up to about 1948, when Ektachrome was
>>>> announced, Kodachrome was made in sheet sized up to 16x20
>>>> inches!  All the larger films were processed in Rochester.
>>>> Commercial and advertising photographers who had come to
>>>> rely on Kodacrhome were very upset at its discontinuance in
>>>> sheet sizes because Ektachrome was thoroughly inferior.
>>>> Ektachrome had the advantage that any commercial lab could
>>>> ste up to process it although it was still quite fussy.
>>>>      Kodak had discovered a method of sequestering the
>>>> couplers in the early 1940s which was used first for
>>>> Kodacolor and its print paper. The color was inferior to
>>>> Kodachrome but the processing was much easier.  At about the
>>>> same time as Kodachrome was announced AGFA had come up with
>>>> a multiple layer color film but using incorporated couplers.
>>>> They had come up with a different method of sequestering the
>>>> couplers than Kodak used.  Agfacolor was not sold outside of
>>>> Germany and most seems to have been used by the government.
>>>>      Both methods of sequestering the couplers continued to
>>>> be used for decades, I am not sure which method survives.
>>>>
>>>>
>>>> --
>>>> Richard Knoppow
>>>> Los Angeles
>>>> WB6KBL
>>>> dickburk at ix.netcom.com
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>
>