I'm taking a class and have free (as in beer) access to b/w
chemicals. Also, I have a few rolls of color (and some slides) laying
around and would be interested to see what they look like when cross
It's kind of silly, but I don't plan on using the rolls for anything
Now what might be worth trying, but I haven't done...
Dev in B&W chem. Re-Expose to light, and then redevelop in
normal chemistry. In theory this should give you a positive
image but with an orange mask. Scan and adjust out the
orange mask, (or print with a ciba process and filter out
the mask) and you should have a usable image but with odd
Alternatively use E6 film, Dev in B&W, reexpose, then dev in
C41. In theory you should get a tranny with an incorrect
I'd be curious if anyone has ever tried these processes.
> chris....@gmail.com wrote:
>> Does anyone have some ballpark times or even qualitative guesses for
>> processing color print film with black and white chemicals?
>> I'm taking a class and have free (as in beer) access to b/w
>> chemicals. Also, I have a few rolls of color (and some slides) laying
>> around and would be interested to see what they look like when cross
>> It's kind of silly, but I don't plan on using the rolls for anything
> Hi, wish I'd seen this sooner, Don't Do It. Cross pricessing is running
> C41 in E6 or vice versa. One time I mistakenly ran one sheet of 4x5 b/w
> thru E6 and it came out clear. Never did it withC41 but I'm pretty sure
> you'd get similiar results. The most popular way is C41 in E6.
Reread what he wrote: he says he as access to black & white chemicals.
Made From Pears: Pretty good chance that the product is at least
Made With Pears: Pretty good chance that pears will be detectable in
Contains Pears: One pear seed per multiple tons of product.
(with apologies to Dorothy L. Sayers)
Processing color print film in B&W chemicals will yield a low contrast
negative with an orange mask, making it fairly difficult to print. For
developing times, start with times/temps about the same as Tri-X or a bit
As for processing B&W films in color chemicals, there is one simple problem:
color negative images are made from dyes, not silver. The dye image is
formed and then the silver is removed. I have developed B&W film in C-41
developer and C-41 fixer, leaving out the bleach step, and it works, but the
chemical activity is fairly low-- longer times and high temps (100F) are
Go ahead and do your cross-processing fun to get it out of your system. By
the way, processing slide film in C-41 chemistry is kinda neat.