Color drift with pigment inks
Color drift with pigment inks
- Subject: Color drift with pigment inks
- From: Marco Ugolini <email@hidden>
- Date: Thu, 02 Jun 2005 17:28:10 -0700
In a message dated Wed, 01 Jun 2005 19:31:23, Tyler Boley wrote:
>> In my own opinion, prints made with dyes do indeed keep drifting for a good
>> long time before their color stabilizes.
> ...
>> But prints from pigments (UltraChrome, at least) don't seem to drift much,
>> if at all observably, after the first half hour or so.
>
> That has not been my experience. I have been waiting at least 24 hours,
> and have noted changes even between 24 hrs and 72 hrs.
> They were significant enough at high densities for me to select
> different limit points after 72 hrs. This was with fine art media, I
> suspect "photo" media will go faster.
> What those changes are in delta Es, or how significant they are in the
> real world, others may have better input.
> Needless to say, getting set up on a new media, iterative linearizations
> then profiling with dry time between each step, takes a bit of time.
What you write makes sense, I mean, that color would keep drifting somewhat
even after 24, or even 72 hours. But what is acceptable is in the eye of the
beholder: what is seen as a large drift by a printer of fine art prints such
as yourself may be deemed minimally troublesome, if not neglectable, in a
proofing environment for, say, packaging design, where drifts on press are
usually much wider than those occurring at any stage in one's own inkjet
proofing setup.
In production environments, unlike in fine-art ones (for which I have the
highest respect and appreciations, coming as I do from a photographic
background), one MUST strike a balance between precision and practicality.
When proofing in-house for packaging design, it is definitely impractical to
wait "between 24 and 72 hours" if all one gets for that is a relatively very
small gain in precision.
On the other hand, that "small gain in precision" may just be what makes or
breaks a fine art print. Different strokes...
--------------
Marco Ugolini
Mill Valley, CA
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