I would shoot 120 K14 no problem.
Maybe you should codify your process and give it a name, like KN-1 or something
EDIT: So can I start buying old K14 rolls on ePay now please please?(On a side note, most of the expired KC 64 on eBay seems to be from the 80's and 90's. Would I just use the usual one stop per decade rule?)
I've posted the entire K12 set here on APUG. I would have to look it up again.
Maybe you should codify your process and give it a name, like KN-1 or something
If this project gets off the ground, don't y'all think we should try to contact McCurry and see if he's game?
I have been, and it seems to work decently like that. I've found it seems to make decent slides up to 3 stops over(It starts to lose colors after that but still has images) so I'd air on the side of overexposure rather than under.
Look at this quote from Dead Link Removed:
"Never more, alas. Unless, of course, some chemist some day comes up with a way to replicate the complex, expensive developing process. Until then, McCurry is biding his time. 'I have a few rolls of Kodachrome in the fridge,' he claims. 'I’m just going to leave it there. My fridge would be kind of empty without them. If they ever revive Kodachrome like they did Polaroid, I’ll be poised and ready to go!'"
If this project gets off the ground, don't y'all think we should try to contact McCurry and see if he's game?
Also, what about speeds other than 64? Kodachrome 25? I suppose you'd have to change the development time?
I can't yet deal with the lengths required for cine film, I'm stretching myself to evenly re-expose a 36exp roll as the re-exposures are all by hand. I am however working on it. I have a couple rolls of double-8mm and 16mm Kodachrome that I'm trying to find a way to process properly.
Sorry about posting the wrong coupler for yellow. Here is the set published in the standard text:
Principles of Color Photography, Evans, Hanson, Brewer, edition 1953 on page 261 lists the following dye couplers as suitable for Kodachrome:
cyan
2,4-dichloro-1-naphthol
magenta
p-nitrobenzyl-cyanide
yellow
naphthoylacetanilide
Text talks of p-phenylenediamine developers.
Later on better couplers--presumably more stable--were used. This whole Kodachrome effort is basically an effort at re-inventing the wheel. Except that nobody seems to listen to what the experts on the wheel are telling them. I don't think we'll get anywhere until somebody talks about synthesizing couplers in a private lab. In other words, if you want to get serious you will have to study organic chemistry.
Except that nobody seems to listen to what the experts on the wheel are telling them. I don't think we'll get anywhere until somebody talks about synthesizing couplers in a private lab. In other words, if you want to get serious you will have to study organic chemistry.
Except that I'm getting results without synthesizing couplers in a lab or having any background in organic chemistry. I'd say I'm getting somewhere.... Will it be perfectly stable and kodachrome identical? Probably not. But I'm well into the "acceptable results" category.
Try reading the patent gentlemen!
PE
Try reading the patent gentlemen!
PE
If Kodak relaunch Kodachrome and one development center for Kodachrome; how many rolls you will buy????
KODACHROME DYE COUPLERS FROM US PATENT 3,658,525
The developing process which is revealed in US patent 3658525, (Bent and Mowrey inventors), discloses enough detailed information that a chemist skilled in photographic processing could use it to duplicate, basically, the method that Kodak used to process Kodachrome color film. A specific example is given on columns 9-11 of the patent, while other parts of the developing compositions are given earlier. Apparently the cyan and yellow developers use CD-4 in the patent, although a different developer--CD-3?--was used in practice.
The specific example in columns 9-11 states exactly the chemical used for the cyan coupler. This is:
CYAN COUPLER FOR KODACHROME FROM US PATENT 3658535
I-Hydroxy-N-(2-acetamidophenethyl)-2-naphthamide.
However, for the other two couplers the example only states the chemical properties which the yellow and the magenta couplers should have. It does not name the couplers exactly. The yellow coupler is of a class of chemicals called an alpha-pivalyl-acetanilide. In the list of sources for couplers given in the Kodachrome patent 3658525 (which appears in column 5), none of the sources listed shows a yellow coupler which is an alpha-pivalyl-acetanilide. However, in a patent about yellow dye couplers granted in 1966, US patent 3265505 (Weissberger and Kibler inventors) there are three dye couplers which are alpha-pivalyl-acetanilides, and which are also diffusible into an emulsion. These ought to be suitable for Kodachrome processing. They are called coupler 18, coupler 20 and coupler 25.
YELLOW COUPLERS FOR KODACHROME FROM US PATENT 3265505
Coupler 18, alpha-Pivalyl-3,5-dicarbomethoxyacetanilide;
Coupler 20, alpha-Pivaly1-alpha - (3 tetradecylcarbamylphenylthio)-3,5-di-carbomethoxyacetanilide.
Coupler 25, Alpha-pivalyl-alpha-( 3-octadecylcarbamyl phenylthio)-4-chlorosulfonylacetanilide
The Kodachrome example process in column 11 says the magenta coupler is a 5-pyrazolone coupler of U.S. Pat. No. 3,152,896. There are eight of these:
MAGENTA COUPLERS FOR KODACHROME FROM US PATENT 3152896
(1) 1 - (2,4,6 — trichlorophenyl) - 3 - (4 - methylsulfo~nylanilino) - 5 - pyrazolone
(2) 1- (2,4,K6-trichlorophenyl) —3- (4-cyanoanilino) —5-pyrazolone
(3) 1- ( 2,4,6-trichlorophenyl ) -3-( 3-cyanoanilino ) —5-pyrazolone
(4) 1- (Z,4,6-trichlorophenyl) —3-(2-chloro-5-cyanoanilino) —5-pyrazolone
(5) 1- (2,4,‘6-trichlorophenyl) —3- ( 3-nitroanilino) —5-pyrazolone
(6) l- (2,4,6-trichlorophenyl) —3- (2,4-dichloroanilino) —5 pyrazolone
(7) 1- (2,6-dichloro-4-nitrophenyl) —3- (2,4-dichloroanilino)—‘5-pyrazolone .
(8) 1- (2,6-dichloro-4-cyanophenyl ) —3- (2,4-dichloroani lino) —g 5-pyraz0l0ne
Here is the structure for magenta coupler (1)
View attachment 171361
Google has a service called Google Patents. Looking at the patents which I've cited can give you an idea about how these chemicals are synthesized. This might be helpful if they are not available commercially. By the way, I think your Kodachrome processing work is a valuable contribution to the field.
Most Kodak yellow couplers are now based on Pivaloyl derivatives. This is for hue and stability. The magenta structure in the figure above is wrong. The cyan and magenta of K14 used CD3 and the yellow used CD6.
Try freepatentsonline.com for excellent search and display properties.
PE
If you substitute couplers outside those referred to in US Patent 3,658,525 how can you be sure that they will diffuse through the emulsion?
(Sorry about posting an inaccurate structure of a magenta coupler; I misread two of the subscripts).
Awesome, so I'll ignore those magentas for now. I appreciate that link. A lot of the copies of the patents I'd found on Google were horrible OCRs that were very hard to decypher.
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