Re: Controlling 6 or 7 inks
Re: Controlling 6 or 7 inks
- Subject: Re: Controlling 6 or 7 inks
- From: Johan Lammens <email@hidden>
- Date: Tue, 29 Oct 2002 10:15:29 +0100
On Tuesday, October 29, 2002, at 02:59 AM,
email@hidden wrote:
From: Marc Levine <email@hidden>
Date: Tue Oct 29, 2002 3:00:05 AM Europe/Madrid
To: <email@hidden>, <email@hidden>
Subject: Re: Controlling 6 or 7 inks
As a side note, I like to be clear that light inks do not increase a
printer's gamut. Any color you can make with light-cyan, you can make
with
cyan. The reason that light inks exist is for smoothness only. The
increased
quality that you get via light ink usage is a result of 2 phenomena:
you
have to print twice as many dots with the light ink as you would with
the
dark, and the fact that your eye cannot find the edge of a light ink
droplet.
I have only one minor quibble with your explanation: using light inks
(light c, light m) actually does increase the gamut compared to an
equivalent system with only "dark" inks. The gains are modest but
noticeable, especially in the light chromatic colors. The explanation
can apparently be found in Beer's law, and comes down to the fact that
using light inks means more ink and hence less white paper for the same
density, as you correctly pointed out. White paper (light) in the
mixture desaturates colors, so less white means less desaturation or
conversely more saturation (chroma).
Johan
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