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louise wrote:
> In article <1125748714.047414.221360@g43g2000cwa.googlegroups.com>,
> How do I set the color temperature of the monitor itself - it goes
> from 5000 to 11000. At the moment it seems most sensible to me to
> put it at the mid-point, 800. Does this sound right?
Hi!
You don't have to input that number by guessing...
1- Try the option of measuring the white point manually, e.g., like
this:
http://www.pictopia.com/perl/doc?process=gamma_control
2- You will be lead to the black screen that shows grey squares with
multiple kinds of greyness.
3- YOU have to choose (clicking back and forth) the one that looks
better representing what YOU feel is OPTIMAL GREY. Now how you judge
that? It is done by TRIAL and ERROR. Best way of trial and error is by
means of choosing some grey which you think is best for YOUR printer.
Choose it (in dark environment) then save it as the default profile
giving it proper name.
4- Get a Pantone uncoated process swatches handy, and choose some grey
4 swatches (in one page).
5- Open new Photoshop document (RGB), and fill 4 rectangles with the
greys of the same chosen 4 swatches combinations, by keying in the
values of CMYK of every chosen swatch (RGB values will be automatically
calculated according to the default profile and the default CMYK setup
conversion curve). Why we choose 4 colors, is to make the comparison in
step 7 easier.
6- Print on a paper that resembles the look (whiteness) and feel
(smoothness) of Pantone paper.
7- Compare Pantone chosen grey with the printed output. If the match
leads to failure distinguish sensible difference (by naked eyes using
average lighting 4 feet away) for the 4 chosen swatches, then YOU HAVE
SUCCEEDED to profile your system to work just nice with your printer.
You have to be cautious as the industrial process printing is done by
pattern of dots, while inkjet modern printers can fill the gaps and you
can see no obvious dots (under loupe).
8- If you see a sensible difference between output and standard
swatches, then you may have mistaken choosing the right grey. So you
repeat the procedure.
You have to notice that this procedure is straightforward and saves you
all speculations. It takes into consideration that the grey printed by
the printer is composed of four colors, because the document was
originally composed in RGB space (given that the CMYK conversion curve
is set to the default medium black generation). The same should apply
to the scanners' profiles. However, the case is easier with scanner as
you scan the greys of standard swatches and print them at once! They
should be a very close or nearly perfect match in correct profiling.
Mohamed Al-Dabbagh
Senior Graphic Designer
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