[texhax] cmyk colors are auto changed!

[Steven Woody]

On 18 April 2011 09:23, Heiko Oberdiek <heiko.oberdiek at googlemail.com> wrote:
> On Mon, Apr 18, 2011 at 08:52:38AM +0800, Steven Woody wrote:
>
>> On 18 April 2011 01:24, Philip Taylor (Webmaster, Ret'd)
>> <P.Taylor at rhul.ac.uk> wrote:
>> >
>> >
>> > Steven Woody wrote:
>> >
>> >> Can I prevent it from happening? I want to all the way use a color
>> >> defined by my company, that is 0.51 green and 0.94 yellow in cmyk.
>> >
>> > Are you concerned about on-screen (in which case, as far
>> > as I know, the answer is "no", as screen devices are
>> > additive (RGB)), or solely about print (subtractive,
>> > CMYK) in which case so long as you specify the colour
>> > correctly in the first place, and do not allow any
>> > intermediate program to change it, all should be well.
>> >
>>
>> I began to understand.  But I am not sure, the pdflatex is a
>> intermediate program that change my definition or not?  If I can see
>> my color definitions in the resulted PDF file, I will be less concern.
>> BTW:  is there some way to turn off the compress level when using
>> pdflatex?
>
> \pdfobjcompresslevel=0
> \pdfcompresslevel=0
>
> Usually the color definitions are written unchanged in the PDF
> file. Package color is not able to do color transformations.
> Package xcolor can translate color definitions from one
> color space to another. But that must be requested and it is
> not the default behaviour.
>
> Yours sincerely
>  Heiko Oberdiek
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Thanks, it really works.


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narke
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