Re: RGB to CMYK
Re: RGB to CMYK
- Subject: Re: RGB to CMYK
- From: Marco Ugolini <email@hidden>
- Date: Mon, 05 Dec 2005 12:57:06 -0800
In a message dated 12/5/05 2:26 AM, Denis Gliksman wrote:
>> The trick, then, is to show the client only what is feasible, and not
>> create misleading expectations (for example, by giving them prints
>> that are unrealistic,
> I did that, refusing to give prints from the R800 for a long time, but i was
> doing some for me, and they wanted some also, and when they compared to the
> chromalin began the mess ...
Yes, if you let the clients see those prints, that works against you,
because they understand nothing about how color works, and may fall in love
with what they see in those unmanaged prints. Trying to explain to them why
the final work will come out looking different is a tricky thing, one that I
do not advise: they will think that you are making excuses, and it will
tarnish your reputation.
>> or showing them image files on uncalibrated/unprofiled
>> displays, etc.).
> Monitors are calibrated, but it is far from CMYK prints ...
If you want a fairly accurate preview and wish to soft-proof your work
(after you calibrate/profile your display), you must make sure to activate
the Proof Setup function in Photoshop using the proper profiles. This step,
and many others, are explained at length in "Real World Color Management"
(by Bruce Fraser, Chris Murphy and Fred Bunting, Peachpit Press, Second
Edition).
>> Your new 4800 is the perfect tool for proofing. Now the hard part is for you
>> to manage it properly. Maybe you want to look at the option of adding a RIP
>> to it.
> Next step may be, but is that really needed to print from CS2 only ?
You will be able to print from Photoshop, Illustrator, InDesign and other
color-savvy applications. Probably not as accurately from Microsoft Word...
;)
> With semi-mat proofing paper and photo-black ink on the 4800 the prints are
> really much softer
> I don't like too much the look of the prints (!...) but it is a big step
> toward chromalin, very close.
That's good.
> I would call them "pre-proof", just for "pre-press" (joke)
Are you printing using "No Color Management" in the printer driver and the
correct Print Space in the "Print with Preview" dialog box in Photoshop?
>>> And you also know your images will be printed in different uses (catalogue
>>> and packaging, not by the same people...)
>>
>> Then it's very unwise to provide more than one file, since it often leads to
>> chaos and fingerpointing (i.e., the other side pointing their fingers *at
>> you*).
> We decided to deliver a CMYK and a Adobe RGB psd "just in case"
That is good only if they know what to do with either file. Do they honor
the embedded profiles? Do they know how to convert properly, respecting the
appearance of the original tagged image?
On the other hand, if they are clueless, that will only confuse or irritate
them.
>>> _ What is the safest CMYK to choose,
>>
>> I would say the one for the highest-quality printing scenario that you are
>> able to predict is going to be used,
> i understand it is Fogra27 ?!...
Others on this forum can answer much more precisely. But that may be correct
("EuropeISOCoatedFOGRA27.icc").
>> Make color-managed proofs on your 4800 for these different conversions, and
>> inspect very closely what comes out. That should be a good starting point to
>> make any necessary adjustments in the file.
> From some tests i did yesterday i cannot see any difference (for this work at
> least) between fogra or euroscale printed the 4800
> the colorspace of the proofing paper of the 4800 is much bigger than fogra or
> euroscale ...
Please always make sure to review very carefully all the steps that lead to
your inkjet proofs (selection of the test chart, how you print it, how you
read it, how you use the measurement data to create a profile, etc.). This
process of reviewing your steps is what is called an "audit." Each step must
be done the proper way, or the results will be unreliable.
The "Real World Color Management" book is very helpful for sorting out these
procedures too.
Good luck.
--------------
Marco Ugolini
Mill Valley, CA
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