Even in chromogenic materials where the imaging dyes come only into existence there are other coloured materials that exist and may be visible in the final product.
So you have in the majority of C-41 films coloured couplers intended for automatic masking, thus intended to survive processing.
In E-6 this mask is omitted, but, as in C-41 materials, there are coloured filter layers that will turn colourless whilst processing.
If the neccessary yellow filter is made out of colloid silver, it will be bleached in the bleach bath typical to most colour processes. However in single step b&w processing, as intented by the OP there is no bleaching, and a yellow layer will remain.
Though, in case the filter layer is made out of dyes, they may turn colourless during processing.
well, 2 nites ago i processed some sensia slide film in caf130
and they look promising. the grain is nice and the negative area not too dense
... i have a whole bunch of fuji sheets and big K quickloads to test this with.
i am excited because i am film and coffee rich, and money for processing poor
thanks for the encouragement !
except for not getting a color image
Originally Posted by Sirius Glass
it seems to be a usable option,
especially since between 4 + 6$ / sheet
to process 4x5 and 5x7 color sheets isn't a usable option
( and i have a bunch of it ) ...
Last edited by Marco B; 08-15-2010 at 09:41 AM. Click to view previous post history.
"The nineteenth century began by believing that what was reasonable was true, and it wound up by believing that what it saw a photograph of, was true.
" - William M. Ivins Jr.
"I don't know, maybe we should disinvent color, and we could just shoot Black & White.
" - David Burnett in 1978
"Analog is chemistry + physics, digital is physics + math, which ones did you like most?
what you suggest is a waste of a latent photograph
is the opposite for me. it is another option
to work with camera made and hand made images.
people similar things to me when
i make photograms on azo paper
" why are you wasting that azo paper, send it to me "
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You did a good job and got an amazing result. I stand by what I said though, in the sense that the OP said he got nothing and I suggested that he should have gotten a yellow foggy negative good for nothing. I think you have shown us that you did get what I suggested, but by very good DR technique, you turned this poor negative into something quite useful and which gave you a very nice result.
It is good to learn what can be done when someone goes beyond what I have personally done and seen. It is good to learn how to "rescue" the film. Congratulations on a very nice extension for us to process our slides. I would not have believed that the yellow filter layer and the fog could be overcome.
Havent you guys heard about scanners and photoshop?
Scan the yellow, and push a button and you have B&W pictures.....
or why fool arond with C41, I have a hunch Caffenol-C might do the trick, but not with 1000 ISO more likely box speed or 2x box speed.
Have a look at the Caffenol group.
I recognize the utility of scanners in this case, but since it is an analog site, I did not wish to get into the scanning issue. Of course you can make a perfectly acceptable print from such a negative using a mixed workflow. I do that myself.
So, my answer should have been "unusable with current analog materials and an analog workflow" . My apologies.
Originally Posted by Photo Engineer
my original posted question was " what happens"
you and frank that it was "good for nothing" and "unusable" ...
i took those terms to suggest there was nothing
on the film, no negative, nothing ( any image on film is useful ).
what i said was i used caffenol c and i got promising results,
the film was not too dense, and had nice grain ..
i never said there wasn't a yellow hue.
when did i say i got "nothing" ??
i am used to "fog" from using caffenol C
so the film had a yellow cast through it, much
like ektachrome has when unfiltered.
your suggestion that things are good for nothing are kind of funny.
there is always a use for things like this, maybe not what you would use them for
but there is always a use.
there are many people that believe using coffee based developers
are " good for nothing" and " useless " and i find this funny as well.
What I like about John's work is his desire to push the possibilities. I think telling him something is useless, or impossible, just pushes his buttons... He seems to find a way to make unique images where others won't tread. It's one of the reasons I look forward to seeing his gallery images.