9:22 p.m.
Hi Roger,
I'm not blaming anyone for anything :-) Just telling Juris what the limits
are to be within the standard.
I'm a consultant, so there are no "my colors". However, running against the
ISO-standard is not just a matter of Delta E for the primary colors. I have
seen instances where close matches of delta E values for primary colors will
result TVI out of range while you could get the TVI in range with higher
Delta E deviations for the primaries.
---
Best Regards
Act IT A/S
Erik Terkelsen
Product Manager
Tel: +45 3692 5660
Dir: +45 3692 5667
Fax: +45 8614 5300
Mail: erikt(a)act-it.dk
Web: www.act-it.dk
BTW we make
_______________________________________________
ECI-EN
________________________________________
Magnus Sandström
Alfa
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From: Roger Breton <graxx(a)videotron.ca>
Reply-To: <eci-en(a)lists.callassoftware.com>
Date: Sat, 10 Nov 2007 13:25:04 -0500
To: <eci-en(a)lists.callassoftware.com>
Subject: Re: [ECI-EN] printing to ISO. is this possible?
Erik,
Can you blame Juris for trying to ge the colors closer? How close are
your
colors, Erik?
Roger Breton
Hi Juris,
The ISO 12647-2 defines that
the primary colors should be within a
DeltaE of
5, so according to the
standard it is "enough".
---
Best
Regards
Act IT A/S
Erik
Terkelsen
Product Manager
Tel: +45 3692
5660
Dir: +45 3692
5667
Fax: +45 8614 5300
Mail:
erikt(a)act-it.dk
Web:
From: <bebris(a)jt.lv>
Reply-To:
<eci-en(a)lists.callassoftware.com>
Date: Fri, 9 Nov 2007 11:08:19 +0200
To:
<eci-en(a)lists.callassoftware.com>
Subject: Re: [ECI-EN] printing to ISO. is
this possible?
Hi Erik and everybody else,
I did measurements from a
press
run like Erik are suggesting. So for Cyan
higher or lower density will
make
Delta E increase. We have to hold density
at 1.30-1.40 to get average
Delta E
of 4!
Is it enough?
I think that I will make a press run with
different inks
and try to get
closer.
regards,
Juris
Erik Terkelsen
<erikt(a)act-it.dk>
Sent by: eci-en-bounces(a)lists.callassoftware.com
2007.11.08
23:39
Please respond
to
eci-en(a)lists.callassoftware.com
To
<eci-en(a)lists.callassoftware.com>
cc
Su
bject
Re: [ECI-EN] printing to ISO. is this possible?
Hi Juris,
You
could
try to run a press-sheet where you set the press to a density a
little
too
high in one side of the sheet and too low in the other side with
an
even
distribution across the sheet. Then measure the solid primary
colors
across
the sheet and find the Lab-values closest to the
target.
If
these values are
not close enough I don’t see how you could get any
closer
using these
inks.
Anyway you are pretty close already
---
Best Regards
Act
IT A/S
Erik
Terkelsen
Product Manager
Tel: +45 3692 5660
Dir: +45
3692 5667
Fax:
+45 8614 5300
Mail: erikt(a)act-it.dk
Web:
From: Magnus
Sandström
<magnus.sandstrom(a)alfaprint.se>
Reply-To:
<eci-en(a)lists.callassoftware.com>
Date: Thu, 08 Nov 2007 22:02:58 +0100
To:
<eci-en(a)lists.callassoftware.com>
Subject: Re: [ECI-EN] printing to ISO. is
this possible?
Hi here is our values:
Cyan: 55 -33 -53
Magenta:
49 74,5 -3
Yellow: 90 -3,5 91
Key: 17,5 1 1
And
our
cyan is a little red..
I think that you are close enough and recommend
that
you correct the proof
the last bit against the press to get the top
notch
similarity. It shouldnt
exeed ∆3 anyway. And your still printing
ISO.
Anyway,
thats what we did. Using GMG Colorproof.
Maybe someone else
got another
opinion?
Regards
Magnus Sandström
bebris(a)jt.lv wrote:
Hello all
I
am trying to match our sheet-fed press to ISO 12647-2
as
close as
possible.
The best Lab numbers I can get for primary colors are
(white backing):
Cyan:
58,1 -34,7 -50,1
Magenta:
49,1
75 -2,9
Yellow: 89,3 -3,5 92,8
Black:
17,4
0,8 0,6
Numbers are close to ISO, but I would like to be
closer.
Specially Cyan and
Yellow could be closer, but for that it looks
like I have
to change ink
manufacturer.
Q: Should I try to get closer or
it's just a
waste of time
(hair-splitting)?
Please, I need your opinion!
color proofs with ISOcoated_v2_efi.icc, and actually
I'm
trying
to get my
press closer to proof. But that's same as ISO.
Thank you
for your time!
regards,
Juris
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