[scribus] How to use color management?

[dwain]

On 8/29/08, Hal V. Engel <hvengel at astound.net> wrote:
>  > hi phillip,
>  > all of the color profiles must be the same on all of yoursoftware and
>  > hardware,
>
>
> Nonsense your profiles MUST be hardware specific for color management to work.
>  Each piece of hardware needs to be characterized (have a hardware specific
>  profile) so that the CMS knows how to handle it's colors.  If you use the same
>  profile for everything then you have in affect turned color management off.

why then are there so many color profiles to chose from?  your
hardware can read a specific profile.  if you set the color profile of
your monitor to sRGB_IEC61966-2-1_noBPC.icc then your monitor responds
to that profile.  if you set it to swop v2 then it reads that and
responds accordingly.  in short the profile makes the hardware respond
to the profile, otherwise, why use the profile.
>
>
>  > except for your camera, but you can assign the profile if
>  > you have photoshop.
>  >
>  > i too do not have any calibrating equipment, but i have found that if
>  > software and hardware have the same color profiles you are in the ball
>  > park.
>
>
> In the ball park of what?

the ball park of managed color.
>
>
>  > i have a viewsonic vp171b that i have an srgb profile with no
>  > black point compensation set as the profile.  the rest of my hardware
>  > carry the same profile.
>
>
> Again in this case you have disabled color management.

how can i have disabled color management when the hardware has a
profile and is responding?
>
>
>  >
>  > i use the user settings with the rgb respectively set at 50% for a
>  > middle gray.  no problems so far.  you could go the calibrator route,
>  > but you have had some good suggestions so far.  as a monitor ages it
>  > needs to be calibrated more often.
>
>
> No not more often with age.  As monitors age (at least for CRTs) calibration
>  becomes more important since the phosphors wear out and change with use.  For
>  CRTs calibration should happen at least once a month and once a week is
>  perhaps a little better.  For LCD monitors things are more stable which means
>  you can use longer intervals between calibrations.

not more often with age you say and then you say that as a crt
monitors age phosphors wear out, which usually happens with age, you
need to calibrate more often.  you are trying to have it both ways.
>
>
>  >
>  > this profile is recommended by the international color consortium for
>  > on screen viewing.
>
>
> They do?  Where is this recommendation located?

look at the line below for your answer.
>
>
>  > here's the starting point to get the profile:
>  > http://www.color.org/resourcemain2.xalter
>  >
>  > i use a commercial printer who prints digitally from pdf files.  he
>  > told me that he can get the color right whether i send a rgb or cmyk
>  > or mixed (gasp) color file.  i have given him all three and what i see
>  > on my monitor is what comes off the press (printer).
>
>
> This is called luck.  Most of his devices are close to sRGB and in the process
>  of creating pdf files for the printer most of the conversions done by the CMS
>  are close to correct.  Again this is because he is lucky rather than becaue
>  his setup is correct.

and you know this how?  i've been studying color management for going
on 10 years.  i've tried all of the profiles to get what i see on
screen on paper and i finally got it right.  yet, you say i have no
color management because i have the same color profile in my software
and hardware.  i do believe you are wrong.  check out
http://www.color.org/  this is where i get my information.  where do
you get yours?

when i try a new commercial printer i always ask what color profile
for cmyk they use and if i don't have it then i ask for a copy.  also,
i used another commercial printer for a magnetic sign.  i gave him a
cmyk (swop v2) pdf and what he printed was what i saw on my screen.
was that luck also.  i don't believe in luck.  i believe in matching
the profiles of the commercial printer and their software settings,
then i know that what i see is what i get in most cases.

besides, most commercial printers will tell you that it doesn't make
any difference what you send them; like you said, their cms handles
the output.


cheers,
dwain

-- 
"Those who would give up essential liberty to purchase a little
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