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Subject: Re: [Homebrew_PCBs] Forcing printing of Magenta or Cyan from RGB in Windows

From: lists <Stuartlists@...>
Date: 2011-10-07

In article
<CAFgkapC58p0cp9Sik=AXAUPJx8=omhKzvTbz6rzQ1JZZzHmjDA@...>,
Andrew Thornber <andrew.thornber@...> wrote:

> Personally if you need to print CMYK then have a look at photo printers
> as they print in the CMYK space. (It's oldish but to prove a point have
> a look at the Epson C82)

I think you will find that all printers, including "home" printers use
CMYK. Certainly all the ink-jets I have owned did. The difference with the
"photo" printers was that they used two further inks, paler versions of
cyan and magenta usually, in order to achieve the delicacy of colour.

One rather old piece of DTP software I have could produce the required
CMYK separations as separate files on a disc for submission to a
commercial printer. I guess it would have been possible just to print
locally from one of these separations.

Although of necessity it uses RGB to display stuff, Photoshop can use a
variety of "colour spaces" internally but I'm not enough of an expert to
know whether it can print the separate colours to a printer.

However, photoshop is just a teeny bit expensive!

--
Stuart Winsor