RE: Color issues when making profiles
RE: Color issues when making profiles
- Subject: RE: Color issues when making profiles
- From: "Richard Corbett" <email@hidden>
- Date: Wed, 30 Nov 2005 00:21:29 -0000
No mention here about linearization.
Richard
-----Original Message-----
From: colorsync-users-bounces+richard=email@hidden
[mailto:colorsync-users-bounces+richard=email@hidden]
On Behalf Of Marco Ugolini
Sent: 29 November 2005 21:25
To: S ö ren Linqvist
Cc: email@hidden
Subject: Re: Color issues when making profiles
In a message dated Tue, Nov 29, 2005 11:45 AM, Sören Lindqvist wrote:
> I have done a RGB profile for Epson R300 with ProfileMaker 5
> The measurement is from 1560 color patches generated by Gretags
Measuretool.
>
> My normal procedure is to read them 3 times with Eye-One Pro using
> Measuretool and averaging them to a final txt file (readings A+B+C=X).
>
> Then I open up ProfileMaker using normal procedure for making RGB profile
> (using Large, Neutral Gray, LOGO etc).
>
> The BIG problem is, I always seem to have a tendency of reddish color in
the
> darker areas. Sometimes more sometimes less but it's still there and it's
no
> fun at all. This is not only for this particular printer.
I'm just venturing a guess here, since I don't know that specific Epson
printer (R300) much at all.
>From looking at the specs on the Epson site, I see that this is a
relatively
inexpensive dye-based unit ($149). I don't have a profile for it to inspect
how the neutrals are graphing in Lab space, but I have a suspicion that the
device may have poor neutrals, and may also not be very linear.
Unfortunately, some printing devices cannot be made to behave very well,
specially when it comes to neutral values, and specially at lower price
points. And there is also the added problem of print appearance changing
under different illuminants (what appears neutral under tungsten lighting
may show a cast in daylight; etc.). In my experience, I found this to happen
more strongly with Epson dye inks than pigments.
If you can afford it, try purchasing a printer that uses UltraChrome K3
pigment inks. Though I don't own one, the opinion seems unanimous that they
deliver highly improved neutrals compared to the previous version of
UltraChrome.
But before you do that, one more thing you could try is to profile your R300
using, instead of the "No Color management" setting in the Color Management
tab of the Epson printer driver, the "Mode : Photo-realistic" option that
appears when you check the Color Controls radio button. Do not check "Epson
Natural Color, and leave all the numbers below at 0 (zero). Try both Gamma
1.8 and 2.2. Create printer presets for these new printing modes, print your
test charts (one for Gamma 1.8, one for Gamma 2.2), then measure them and
create profiles. You may experience improved results this way, hopefully.
Please let me know how it turns out.
Good luck.
--------------
Marco Ugolini
Mill Valley, CA
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