FotoDave@aol.com
Mon, 11 Jan 1999 12:11:13 -0500 (EST)
In a message dated 1/10/99 8:26:06 PM Pacific Standard Time,
cooper@wvinter.net writes:
> I have been trying to print some slides using the R-3000 process with
> Kodak's RadianceIII papers. I began by using the suggested filtration
> of 20C and 10M which gave overly yellow prints. I corrected the problem
> with equal amounts of magenta and cyan. Then I noticed that the greys
> from a slide of the Macbeth Color Checker were coming out green. I
> tried adding more magenta filtration, however ....
<snip>
Without seeing the print, it's hard to judge how bad the crossover is.
Note, however, when you are printing directly from positive to positive, the
bottom line is the print materials use imperfect dyes and you don't go through
color-correction stage (internegatives integral masking, color separation uses
color-correction masks), so it is impossible to get perfect balance. You can
read about the theoretical part on many printing / science of photography
books, or for simple discussion, see Ctein's article (also in his latest book
Post Exposure).
Well, to be accurate, the manufacturer can set the curve so that a gray scale
prints as perfect gray, but in order to achive that, saturated color must
become less saturated. There is simply a conflict in requirement because of
the imperfection of dyes. I would think that KODAK would assume that when
people want to print slides directly to print, they would want to maintain the
nice saturation, so the balance might have been chosen to keep saturation
rather than perfect gray.
So you can start with your MacBeth balancing, and as soon as you become close
to gray balance, you can print your image and go from there.
Of course, if the crossover is very bad, then there might be other problems,
and as suggested, contact KODAK for that.
Dave
This archive was generated by hypermail 2.0b3 on Sat Nov 06 1999 - 10:06:41