Re: separation negatives for colour? (fwd)

"J. Wayde Allen" <wallen@boulder.nist.gov> · Fri, 06 Oct 2000 03:21:14 -0600 (MDT)

On Fri, 6 Oct 2000, Lukas Werth wrote:

> I would like to try some colour prints from slides in direct carbon.
> 
> I am - at least at this point - not concerned with absolutely natural
> colour renderings, but would like to explore possibilities of "recreating"
> my slides' colours in different pigments.

You might be interested in checking out the carbon print gallery at
<http://rmp.opusis.com/carbon/gallery.html>.  These are traditional carbon
rather than direct carbon, but it should give you an idea about what is
possible.

> I do not have a scanner, so I would like to try the analog road. 
> My question: is there a cheaper way for separation negatives than
> panchromatic film? Is there photographic paper/orthochromatic film which
> can be tweaked to work? Is there room for experiments or would these be
> doomed from the beginning?

Kodak makes a panchromatic B&W paper for making B&W prints from color
film.  I think it is for color negatives rather than slides though.  Can't
think of the products name off the top of my head, nor can I offer any
help since I've never used it.  As I recall it is kind of pricey too.

The problem with using an orthochromatic film is that you probably won't
have much luck making the red separation negative.  Trying to expose an
ortho material with a red filter is basically like trying to expose it
with a safelight.  Otherwise, paper negatives do work (see
<http://rmp.opusis.com/carbon/image10.html>).

If you want to talk a lot more about carbon processes see:
   <http://rmp.opusis.com/mailman/listinfo/carbon>
and
   <http://rmp.opusis.com/carbon/carbon.html>.

- Wayde
  (wallen@its.bldrdoc.gov)