[pure-silver] Re: Developing Kodachrome
----- Original Message ----- From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, June 22, 2009 10:14 AM
Subject: [pure-silver] Re: Developing Kodachrome



"Martin magid" <martin.magid@xxxxxxxxx>
I was recently given some 35mm Kodachrome dated in the mid 1980s, 
supposedly frozen all that time.
There is a good chance it is still usable - try a roll and send it 
off to Dwayne's.
I just ordered my last brick of K64. Figure if Dwayne's stops processing it at the end of 2010 I have to shoot a lot of slides ... 

Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121
I concur with this, I am pretty sure the current process is the same as used in 1980. At least contact Dwayne's and ask about it. Kodachrome processed as B&W has the problem that the yellow filter layer can not be removed. In Kodachrome this layer is composed of colloidal (very fine) silver. It is normally removed in the last bleach step where all the silver is removed leaving only the dye images. It is possible to print with the yellow layer but its likely you will have to make a diapositive on panchromatic film and a duplicate negative from that. Because the filter layer is such finely devided silver it is possible that a very mild silver bleach will remove it without affecting the image silver too much. Such a bleach can be made from film strength rapid fixer by adding about 15grams/liter of citric acid to it. 

--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 
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