View Poll Results: Would you buy & use a modern Autochrome-type film?
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I don't think that a workable color negative additive system has ever been demonstrated.
If you develop an Autochrome or Dufaycolor as a negative, it creates a negative color image resembling an unmasked C-41 neg. What more is there to do?
There's an historical example of this in Bertrand Lavedrine's book.
Mind you, this is with the unspeakable as our end result.
Last edited by holmburgers; 04-11-2012 at 12:28 PM. Click to view previous post history.
Reason: added photo
I'm not familiar with Dufaycolor, but the Autochromes I've seen in museums are wonderful.
I would be interested to try new Autochrome in 8x10 sheet film, especially if Dr5 could process the b/w reversal layer.
ASA 25 would be nice, but I have a heavy tripod.
On 2nd thought, 35mm is theoretically possible. PolaChrome was a screen-plate process.
Check out this big pic from flickr, you can see the RGB screen. Not bad... http://www.flickr.com/photos/chuckth...n/photostream/
I'm curious how Polaroid made the screen.
Dufaycolor was used in a small number of 35mm movie films in the 1930's, in a color neg/positive film format. I've seen some on video and the results are entirely usable, if not up to some other systems. I believe that difficulties included, registration of the screen in printing, slow speed of the film for studio work and loss of brightness in projection due to the screen, so it was never widely adopted.
Originally Posted by Photo Engineer
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If you will do the same recipe Autochrome with Lavedrine book , You will be needed to buy Acid Blue 3 Patent Blue dye.
Formula says 24 grams per 100 ml and 25mg costs 80 dollars. 24 grams of patent blue costs nearly 70 000 dollars , seventy thousand dollars.
You are talking to sell one sheet per 5 dollars. I think you won the lottery and want to spread golden coins to fishes in the pond.
Replicating something verbatim is not my interest. The Lumieres chose what they did because it produced the best result for the time and because it could be manufactured affordably. I think the goal should be a result, not a process. An end, not the means.
Reagent grade, analytical quality dyes from Sigma-Aldrich are always going to be expensive, but there are cheaper manufacturers out there for all sorts of colorants.
Last edited by holmburgers; 04-11-2012 at 03:05 PM. Click to view previous post history.
Well, the references that I found about Dufay are ambiguous as to whether it was pos-pos or neg-pos when used for MP films. The inference there was pos-pos as it was compared to Kodachrome and Technicolor which are both pos-pos.
As far as making a negative, I guess I never saw reference to any working examples of negative Dufay or Autochrome. Sorry.
I'd use it if it came in 8x10 plates (first choice) or film. Price would depend upon results, of course. But I'd probably try it either way. Scanning and ink jet prints from an autochrome would be interesting.
Originally Posted by holmburgers
Votes very much appreciated.
Just gettin' you ready for November...