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#1
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Kodachrome
Hi All,
I have inherited some kodachrome 64 and kodachrome 25. This now cannot be processed in England, has anyone got another way in which this film can be used? or has it all got to be thrown in the bin? Many thanks in advance |
#2
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Kodachrome
On 2011-06-25 15:06:27 -0400, polly filler said:
Hi All, I have inherited some kodachrome 64 and kodachrome 25. This now cannot be processed in England, has anyone got another way in which this film can be used? or has it all got to be thrown in the bin? Many thanks in advance The last run of Kodachrome processing anywhere in the world was at Dwayne's in Parsons Kansas on December 31 of last year. This was extensively in the news. Unless someone decides to contract with Kodak to resurrect the whole thing, you cannot process (or buy new) Kodachrome anywhere ever again. -- Michael |
#3
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Kodachrome
On 2011-06-25 15:06:27 -0400, polly filler said:
Hi All, I have inherited some kodachrome 64 and kodachrome 25. This now cannot be processed in England, has anyone got another way in which this film can be used? or has it all got to be thrown in the bin? Many thanks in advance And BTW unless the 25 was kept cold or frozen (preferably) it wouldn't be good anymore now even if it could be processed, as it is many years out of date. -- Michael |
#4
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Kodachrome
Michael wrote:
The last run of Kodachrome processing anywhere in the world was at Dwayne's in Parsons Kansas on December 31 of last year. This was extensively in the news. Unless someone decides to contract with Kodak to resurrect the whole thing, you cannot process (or buy new) Kodachrome anywhere ever again. That may not be the case, in reality there was at least one more run AFTER the much covered "last run". It was announced, but since the press had already buried Kodachrome it was not covered widely. It would be a good idea to contact Dwayne's and see if they plan to do another run. If not, it still can be developed into black and white if it is already exposed and contains irreplaceable images. If it is still in the box, and the boxes are in good shape, there is or will be a market for it to collectors and you should pack it well and save it for a few years and then offer it on eBay. Geoff. -- Geoffrey S. Mendelson N3OWJ/4X1GM Making your enemy reliant on software you support is the best revenge. |
#5
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Kodachrome
"Michael" wrote in message news:2011062517095765045-adunc79617@mypacksnet... On 2011-06-25 15:06:27 -0400, polly filler said: Hi All, I have inherited some kodachrome 64 and kodachrome 25. This now cannot be processed in England, has anyone got another way in which this film can be used? or has it all got to be thrown in the bin? Many thanks in advance And BTW unless the 25 was kept cold or frozen (preferably) it wouldn't be good anymore now even if it could be processed, as it is many years out of date. -- Michael It's all been kept in the freezer, and it still is Thanks all |
#6
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Kodachrome
On 2011-06-26 01:29:03 -0400, Geoffrey S. Mendelson said:
Michael wrote: The last run of Kodachrome processing anywhere in the world was at Dwayne's in Parsons Kansas on December 31 of last year. This was extensively in the news. Unless someone decides to contract with Kodak to resurrect the whole thing, you cannot process (or buy new) Kodachrome anywhere ever again. That may not be the case, in reality there was at least one more run AFTER the much covered "last run". It was announced, but since the press had already buried Kodachrome it was not covered widely. It would be a good idea to contact Dwayne's and see if they plan to do another run. If not, it still can be developed into black and white if it is already exposed and contains irreplaceable images. If it is still in the box, and the boxes are in good shape, there is or will be a market for it to collectors and you should pack it well and save it for a few years and then offer it on eBay. Geoff. The last acceptance date at Dwayne's was 12/30 with the last run set for 12/31. In fact so much came in at the end that they did run over into the new year, but technically that was the same run and it is now over. -- Michael |
#7
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Kodachrome
Michael wrote:
The last acceptance date at Dwayne's was 12/30 with the last run set for 12/31. In fact so much came in at the end that they did run over into the new year, but technically that was the same run and it is now over. The process for the older kodachrome is public knowledge, Kodak made it for government use long after they discontinued the consumer film. Maybe they will release the formula for the last process and in a few years some enterprising person will buy up an old kodachrome processing machine, whip up a batch of chemicals and offer processing. Someone might even care enough to reverse engineer the film, like they are doing with Polaroid. Geoff. -- Geoffrey S. Mendelson N3OWJ/4X1GM Making your enemy reliant on software you support is the best revenge. |
#8
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Kodachrome
"Geoffrey S. Mendelson" schrieb:
Maybe they will release the formula for the last process and in a few years some enterprising person will buy up an old kodachrome processing machine, Someone claims to have to done just that - he saved an old K-lab processor from the scrap heap. whip up a batch of chemicals and offer processing. Now, there´s the problem. AFAIK no one is able to come up with all the dyes needed to process it. http://www.kodachromeproject.com Beating a dead horse, I´m afraid. Someone might even care enough to reverse engineer the film, like they are doing with Polaroid. The film by itself was rather simple, not only when compared to Polaroid. Geoff. Gruss, Roman -- "An MDCCCXII/Mémorable par la campagne contre les Russes/ Sous le préfectura de Jules Doazan." "Vu et approuvé par nous commandant russe de la ville de Coblentz/ le 1er janvier 1814." |
#9
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Kodachrome
"Geoffrey S. Mendelson" wrote in message ... Michael wrote: The last acceptance date at Dwayne's was 12/30 with the last run set for 12/31. In fact so much came in at the end that they did run over into the new year, but technically that was the same run and it is now over. The process for the older kodachrome is public knowledge, Kodak made it for government use long after they discontinued the consumer film. Maybe they will release the formula for the last process and in a few years some enterprising person will buy up an old kodachrome processing machine, whip up a batch of chemicals and offer processing. Someone might even care enough to reverse engineer the film, like they are doing with Polaroid. Geoff. It would be interesting to know if the last series of Kodachrome could be processed acceptably in whatever formulas may be in the public domain. Processing is complex but probably doable. Kodachrome film is essentially three layers of black and white silver emulsion coated over one another with thin separating layers of plain gelatin plus a yellow filter made of colloidal silver coated under the top layer. Its necessary for the first developer to preserve the color sensitizing of the bottom (red sensitive) layer beause that is used to separate the second exposures. The process requires three color development steps with associated rinses. The three layers are reversed indepently by selective re-exposure. The bottom layer is panchromatic and the center layer orthochromatic, so it is _not_ sensitive to red light. If the film is exposed to red light through the support the bottom layer only becomes redevelopable and is developed in a developer containing a coupler for cyan dye. The top layer is then flashed using blue light. This exposes the top layer but can not get through the yellow filter layer so only the top layer will be redeveloped. The developer for it contains the coupler for yellow dye. Since all the silver in both top and bottom layers are now developed no light can get through from either side so the center layer is developed in a fogging developer containing the coupler for magenta dye. After the color development is complete the silver in all three layers and the yellow filter layer is bleached out leaving the positive color image composed of dyes. There is a bit more to all this since the film must also be washed and stabilized. Kodak came up with this process originally because it could not find a way to sequester the couplers in the film layers. The couplers, and thus the color, tended to wander from layer to layer, so, Kodak decided on a process where the couplers were in the reversal developers rather than in the film. AGFA at about the same time, came out with a coupler incorporated multi-layer film but AFAIK it was never available in the USA. AGFA's method of sequestering the couplers was to attach the coupler molecules to long chain molecules that were large enough so that they could not move around in the gelatin. This process worked pretty well although the early AGFA film looked grainy and low saturation compared to Kodachrome. Kodak later devised another method of anchoring the couplers: the couplers were encapsulated in a resin. The resin droplets were too large to move around in the gelatin. The color developer needed to have a solvent for the resin, a sort of alcohol being used. This type of film will look hazy after development until it dries. I think the surviving method is the AGFA one but am not sure. Its very possible that Kodak had access to all the AGFA information since AGFA-Ansco and its parent General Aniline and Film Corp, a front for the German I.G.Farben, was siezed by the government and held by the alien property administration until some time after the war. Kodak may have used the AGFA method for some color aerial film but Kodacolor used the Kodak method as did the post-war Ektachrome and Ektacolor. Color printing methods were similar, a color printing material called Kotavachrome was available for Kodachrome slides and used the same technique. This material was coated on a translucent plastic material instead of paper to make the flashing possible. The original process for developing Kodachrome was different than the one described above and was used for only about a year. This was based on the controlled penetration of bleach into the film layers. The film was first developed to a negative in all three layers. Then all three layers and the yellow filter layer were bleached leaving only the unexposed halide in all three layers. The film was then flashed and developed in the cyan coupler. This produced a cyan image in all three layers. The film was then washed and dried, the drying to control the absorption of the gelatin. It was then floated in a bath of a bleach which penetrated the top two layers removing the cyan dye and bleaching the silver back to halide. The again washed and dried. Now it was flashed again and this time developed in the magenta coupler, which produced a magenta image in the top two layers. Agaain the film was bleached to remove the cyan dye in the top layer and convert the silver there into halide. It was then flashed a third time and developed in the yellow coupler. The film now had a positive silver image in all three layers along with a positive dye image. The silver was then bleached in a bleach which preserved the dye image and then fixed and washed. Whew, that was a lot of work. Much of the work of the two Leos was in finding methods of differential penetration of processing chemicals. This system was AFAIK used only for the original 16mm motion picture version of Kodachrome. The differential re-exposure method was adopted around 1937 and at the same time Kodachrome began to be available in other formats, noteably 35mm still film and in sheet film. At one time sheet Kodachrome up to 11X14 was available. All this film was processed in Rochester, N.Y. but eventually plants for motion picture film and 35mm still film were built in other cities. For some reason Kodachrome has a remarkable stability in dark storage although it is _less_ resistant to fading under exposure to light as in projection. I think part of the popularity of Kodachrome came from its brilliant rendition of color. Technicolor decided on a similar look despite the extreme flexibility of the Technicolor process which was capable of producing very delicate color when desired. Brilliant color was what the customers wanted so its what they got. Keep in mind that color used to be expensive, difficult, and remarkable. With the introduction of newer materials it became cheaper, more common, and, eventually the rule rather than the exception. These days its monochrome which is considered exotic. -- Richard Knoppow Los Angeles, CA, USA |
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