[argyllcms] Re: Number of patches - well behaved printer?

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 23 Feb 2011 10:17:57 +1100

edmund ronald wrote:

Hello Edmund. On the bold assumption that you are being sincere, and
aren't simply trawling, I'll respond:

Why d'you bother with such long drying times?
An hour seems fine to me,

Because it makes a difference with most media & ink combinations.
If the aim is for the print to be correct after 24 hours, then
it's safer to make the measurements after 24 hours. (Some of
us have been through the exercise of actually measuring this. Print
a small chart, and then measure it at intervals. Plot the delta
E against time. Pick a time when the remaining delta E is small enough.
It's not often one finds a combination that is stable after 10 minutes.)

and the native Color Monkey software itself
is probably more than good enough.

That very much depends on ones requirements. The supplied color munki
software may well be satisfactory for casual or home enthusiast use,
if you are lucky. By "lucky" I mean that any profile that depends on
so few measurements makes many assumptions about the behaviour of
the device it is modelling. If your device happens to behave like
their model, you will get a good profile. If your device doesn't
match the model somewhere in it's gamut, you get a bad fitting
profile. The only way to get a good fitting profile for any device
is to measure it closely, leaving smaller gaps to be filled by
the model assumptions. So for critical use such as proofing,
measuring a lot of points (1000 - 5000) can and does make a difference.

Graeme Gill.

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