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Photo Forum / Film Photography / Darkroom / February 2004Kodachrome (K-14) vs. Ektachrome (E-6) Color Slides
Hello, I have a few questions about color slides, some of which I have wondered about for the past 20 years or so. Could anyone answer these?: 1) What all is involved in the K-14 process? How many, and what kind of chemicals are there? Why have they never been available to the public? 2) What would happen if someone tried to process Kodachrome film using the E-6 process? 3) What is the difference in chemistry between Kodachrome and Ektachrome films? 4) In detail, what do each of the 7 chemicals in the E-6 process actually do? If you omit the color developer step, will you get B&W slides? 5) Is it possible to process C-41 print film using E-6 or K-14 chemicals to end up with slides instead of negatives? What about D-76 B&W print film? 6) Since color slides were invented in 1936, what year were the first color prints available? All of my parents' family photos older than the mid-60's are all B&W, except for color slides from the 50's. Thanks, Jeff > 1) What all is involved in the K-14 process? How many, and what kind > of chemicals are there? There are 14 steps (K-14, get it?) Here is a link to the K-Lab processing manual on the Kodak site. You can read the section on "processing steps" to get a better idea of how it works: http://www.kodak.com/global/en/service/Zmanuals/z50.shtml > Why have they never been available to the public? There are a number of reasons. The process is complicated, and has to be very tightly controlled, both chemically and the temperatures. It is probably beyond most amateur's abilities. You also need a pure red and a pure blue light to re-expose the film during processing. Finally, one of the chemicals, used for refogging the film, is somewhat toxic, and Kodak probably never wanted to take the risk. > 2) What would happen if someone tried to process Kodachrome film using > the E-6 process? You would first upset the person doing the processing. Kodachrome has a unique antihalation backing called Remjet that will come off the film in the first processing step. The backing will deposit itself like a tar all through the processing machine. The machine then has to be taken apart to be cleaned. Other than that, the processes are entirely different. E-6 relies on dyes already in the film, while Kodachrome is essentially a multi-layer black and white film, where the dyes are added during processing. In short, you won't get anything. > 3) What is the difference in chemistry between Kodachrome and > Ektachrome films? As above, they are quite different. >> 1) What all is involved in the K-14 process? How many, and what kind >> of chemicals are there? [quoted text clipped - 32 lines] > > As above, they are quite different. One note: It's very possible to process C-41 as E6 and vice versa. First, you will get slides from your print film or negs from your slide film. However the colours become very strange indeed. I have done this on a number of occasions with varying, albeit artistic results. >One note: It's very possible to process C-41 as E6 and vice versa. >First, you will get slides from your print film or negs from your slide >film. However the colours become very strange indeed. I have done this >on a number of occasions with varying, albeit artistic results. I had E6 (Ektachrome 200) processed with C41 through a mistake at a photolab once. The "prints" that were returned to me looked very ethereal. The "negatives" had a wierd bluish cast (completely unlike the orangy cast you usually encounter with REAL negative film). The lab never caught their mistake until I pointed it out and complained, and then they gave me those shots for free and free processing on a future roll of slide film. I took them up on the free processing of the next roll, then changed future processing jobs over to another lab. > 1) What all is involved in the K-14 process? How many, and what kind > of chemicals are there? Why have they never been available to the > public? Don't know. Kodak has never been forthcoming about what is in the process. > 2) What would happen if someone tried to process Kodachrome film using > the E-6 process? You would end up with orange film with nothing on it. > 3) What is the difference in chemistry between Kodachrome and > Ektachrome films? Don't know. > 4) In detail, what do each of the 7 chemicals in the E-6 process > actually do? If you omit the color developer step, will you get B&W > slides? you'll get blank film. 1. developer - develops exposed silver to a normal b&w image 2. stop bath at one time a second exposure to light was needed here. 3. color developer -- develops the rest of the silver and causes the dyes coupled to the silver to "develop" 4. bleach - converts all silver to solulable. 5. fixer - standard fixer disolves the silver. 6. wash 7. stabilizer -- makes the dyes last longer used to be formadlehyde. The process can be cut down to a developer/color developer combination, bleach/fix (blix) combination, wash/stabilizer combination assuimg the chemicals are not reused. If they are to be reused a wash or stop bath would be needed between the developers and blix to prevent contamination. > 5) Is it possible to process C-41 print film using E-6 or K-14 > chemicals to end up with slides instead of negatives? What about D-76 > B&W print film? no. but there have been some interesting results published using C-41 for E-6 film. > 6) Since color slides were invented in 1936, what year were the first > color prints available? All of my parents' family photos older than > the mid-60's are all B&W, except for color slides from the 50's. no idea. Geoff.  SignatureGeoffrey S. Mendelson gsm@mendelson.com 972-54-608-069 Icq/AIM Uin: 2661079 MSN IM: geoffrey_mendelson@hotmail.com (Not for email) > Hello, > [quoted text clipped - 5 lines] > of chemicals are there? Why have they never been available to the > public? First developer, three reversal exposures and three color devlopers, bleach, fix, wash, etc. > 2) What would happen if someone tried to process Kodachrome film using > the E-6 process? Blank film. > 3) What is the difference in chemistry between Kodachrome and > Ektachrome films? Different kind of color couplers. Kodachrome's couplers are in teh developers, Ektachrome couplers are in the film. > 4) In detail, what do each of the 7 chemicals in the E-6 process > actually do? If you omit the color developer step, will you get B&W > slides? No, you will get nothing but bank film... > 5) Is it possible to process C-41 print film using E-6 or K-14 > chemicals to end up with slides instead of negatives? What about D-76 [quoted text clipped - 3 lines] > color prints available? All of my parents' family photos older than > the mid-60's are all B&W, except for color slides from the 50's. Kodak made Kodachrome prints service available soon after Kodachrome film became available. > Thanks, > Jeff > 1) What all is involved in the K-14 process? How many, and what kind > of chemicals are there? Why have they never been available to the > public? No available. because it need special hardware to exposure the 3 emulsion layers color by color. > 2) What would happen if someone tried to process Kodachrome film using > the E-6 process? no image...all silver metal will be converted to silver halide by the bleach and dissolved by fixer, because no dye will be ever formed. > 3) What is the difference in chemistry between Kodachrome and > Ektachrome films? R, G, B reversal exposure and 3 different colour developer. > 4) In detail, what do each of the 7 chemicals in the E-6 process > actually do? If you omit the color developer step, will you get B&W > slides? First dev converts latent image to silver metal. Reversal bath chemical fog the undeveloped silver halide. Color developer develop the chemically fogged silver halide to silver metal and form dyes. Conditioner prepares the film for the bleach. Bleach converts all silver metal to silver halide. Fixer dissolves all silver halide. Stabiliser stablises the color dye and help drying evenly. > 5) Is it possible to process C-41 print film using E-6 or K-14 > chemicals to end up with slides instead of negatives? What about D-76 > B&W print film? C41 film can go through E6 and form positive image. B/W film in C41 or E6 will become transparent as all silver metal will be removed by bleach and fixer > 6) Since color slides were invented in 1936, what year were the first > color prints available? All of my parents' family photos older than > the mid-60's are all B&W, except for color slides from the 50's. SignaturePlease remove NOSPAM when replying! -- My Underwater Photo Album: http://www.geocities.com/hmlai88/ Have a nice day and eat as much as you can! =========================================== Lonely Boy http://www.geocities.com/lonelyb ICQ: 1176912 |
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