RE: Is a printer's full gamut used to make a profile?
RE: Is a printer's full gamut used to make a profile?
- Subject: RE: Is a printer's full gamut used to make a profile?
- From: Ulf Grossmann <email@hidden>
- Date: Wed, 19 Sep 2001 11:21:13 +0200
One stupid question from my side.
What is the full color gamut of the printer?
Do you think you will get the full color gamut of your printer if you print
with max ink per chanal? This is not true, I have been doing profiles for
Inkjets now for 5 years. My result is, and this is what we have implemented
in our Best Products, that you get a larger gamut if you reduce the inklimit
per chanal. i.e. you will get a better Green, if you reduce the Cyan from an
Epson DYE Printer (SP5000).
Why?
Your measurement chart has many colorpatches, but it is possible that no
patch will show you the green with the highest saturation.Especialy with the
IT8n Target you get trouble to find the largest color gamut, because you
have only 6 steps (0%, 10%, 20%, 40%, 70% and 100%) at each Color (CMYK)if
you print them together. For the SP5000 the combination of 60% Cyan and 80%
Yellow produce the Green with the highest saturation, all other combinations
are lower saturated. You see the problem, inside the IT8 Chart you can't
find this combination. Now you can say, o.k. i use a different chart with
more patches. This will help you to find the colorgamut, but there is a
additional problem, no paper can rearly handle 400% Ink. I know, there are
some paper where it seems, that they will do this, but you get a extremly
fading (colorshift in gray)in dark areas. For getting more stable results
you must lower the Total Ink Amount and then you loose color gamut in the
dark area.
Getting the correct inklimit per chanal is the better way, for getting the
largest Color gamut of an inkjet.
Best regards
Ulf Grossmann