Mike & William,
My Name is Nathan Gaydhani, I recently joined the list, I am a digital artist and retoucher.
I think it is also important to bear in mind the use of working in different colour spaces.
As has been said, monitors are capable of reproducing CMYK colour very well which is good if we want to be able to get as close as we can to our printed work on screen.
However the default space for images coming in from cameras and scanners is RGB as the sensors in these devices measure the primary colours of light (Red, Green, Blue), although it is possible to scan straight into a CMYK format.
When I am manipulating images, I want to work in the largest colour space I can until I am happy with the result. I am likely to keep changing an image and it's colours many times and would not want to be limited by the CMYK colours until as late in the process as possible. As we all know there are many RGB colours that cannot be reproduced in CMYK but they can be seen on a monitor. This means that we can work with as much information as possible and then window the best CMYK colours when we are ready to print.
For specific needs, the fact that CMYK gives us the use of black as well, it is true we can create tones in CMYK that we cannot in RGB. Indeed there are also some colours that can only be achieved in CMYK and not in RGB (Browns & turquoises etc) but these represent a far smaller proportion than the extra information that can exist in an RGB colour space.
There are some good demonstration charts on this page.
http://www.idea-digital.com/knowledge/colourspace.html
I would welcome any thoughts by people that disagree,
Nathan Gaydhani BSc.
Photographic & Digital Imaging.
nathan - photography and digital imaging
The Studio, 53 High Street, Sutton Village
Bedfordshire SG19 2NF t. 01767 261 952
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of william.curwen
Sent: 11 August 2003 13:09
To: [EMAIL PROTECTED]
Subject: Re: [PRODIG] CMYK - Urban Myth?
On: Sat, 09 Aug 2003 Michael Harvey wrote:-
> 'Oh, we NEVER work in cmky as you can't tell what you're looking at on the
> monitor...'
Wrong
> after further questioning..
>
> 'A monitor cannot display CMYK data correctly so it is impossible to retouch
> in cmyk for any of our clients'
Wrong
> and this from someone on a Barco monitor.
Uncalibrated I imagine.
> Anyone know what he meant?
He meant that you perpetuate an untruth - (or an urban myth:) to make
himself feel better.
An RGB calibrated monitor can display around 60% of the colours that the
human eye sees, and around 95-96% of the CMYK colours which can seen within
an RGB colourspace. This is how and why CMYK editing works on a calibrated
RGB display.
William Curwen
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