That's because Kodachrome still film is processed on the same equipment, spliced together. Kodachrome must be processed on roller processor equipment due to the nature of the film (no batch processing possible) -- it is developed as a black and white negative, just like more modern substantive color transparency film, but the color development is done in three steps after selective re-exposure. The film in esposed to blue light from the front to re-expose the yellow positive image, and developed in a color developer solution that contains the yellow couplers to make the yellow dye. The yellow filter layer prevents and exposure to the rest of the color layers. It is then washed and exposed to red light from the back and developed in the cyan developer, washed, and either exposed to white light or more commonly chemically re-exposed and developed in a magenta dye coupler bath. There are probably some B&W "getter" developments to prevent color cross contamination, too. It is then bleached to remove the silver, fixed, and dried. I suspect is is still lacquered, too.
Not something you can do with a developing tank. Only the last two versions can be developed right now as the dye couplers for the earlier versions are no longer manufactured. Once the current ones are gone, there will be no way to do the color development unless someone makes the dye couplers. Others will work, of course, but the colors will be off. Peter -----Original Message----- >From: Jim Cathey <j...@windwireless.net> >Sent: Aug 19, 2009 8:17 AM >To: Mercedes Discussion List <mercedes@okiebenz.com> >Subject: Re: [MBZ] kodachrome lowdown > >> here's the remaining lab for kodachrome >> http://www.dwaynesphoto.com/newsite2006/movies-kodachrome.html > >Didn't say anything about stills, just movie film. >I think I have some K with mailers around here. I know >I have one roll of 120, of uncertain pedigree. > >-- Jim > > > >_______________________________________ >http://www.okiebenz.com >For new and used parts go to www.okiebenz.com >To search list archives http://www.okiebenz.com/archive/ > >To Unsubscribe or change delivery options go to: >http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
