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:
www.act-it.dk
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:
www.act-it.dk
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!
BTW we make
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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--
________________________________________
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Alfa Print
AB
Besöksadress: Cirkusgränd 2, Sundbyberg
Post: Box 6003, 171 06
Solna
Tel: 08 54 600 774
www.alfaprint.se <http://www.alfaprint.se>
<http://www.alfaprint.se/>
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