Digital BW, The Print

Alessandro,

You wrote:

>Just to see what happens I opened 21-step image in Photoshop, converted to
>RGB, applied the curve and I measured (with the eyedropper tool) the three
>zones which look cyan, magenta and yellow, and I saw that the values are
>RGB(0,255,255), RGB(255,0,255) and RGB(255,255,0). I must suppose that the
>epson driver consider these values as pure C, M and Y, and therefore
outputs
>a single ink for each of them, am I right?

That is my assumption, and it appears to be close enough to correct to use
the Color Test curve and 21-step test file as a way to compare midtone ink
densities (only the full-strength "colors," not the light/photos inks in a
6-ink printer).
...

Paul
http://www.PaulRoark.com

________________________

-----Original Message-----
From: Paul Roark [mailto:paul.roark@...]
Sent: marted\ufffd 6 novembre 2001 00.20
To: DigitalB&WPrint
Subject: RE: [Digital BW] Quad Ink Densities -- Color Test and 21-step test
file locations

<snip>

All the "Color Test" does is pump out 100% of each quad (not hex) ink
separately.  It'll be obvious which ink is which.  The black ink is in the
100% spot (ignore the 90-95% blocks, they are a mix), the cyan is the second
from the left, the magenta (on a quad machine) is the second from the right,
and the toner on the MIS VM or lightest gray (yellow position) Piezo/FS ink
is on the right.