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@act-it.dk> Sent by: eci-en-bounces@lists.callassoftware.com
2007.11.08 23:39
Please respond to
eci-en@lists.callassoftware.com
To
<eci-en@lists.callassoftware.com>
cc
Subject
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
From: Magnus Sandströšm <magnus.sandstrom@alfaprint.se>
Reply-To: <eci-en@lists.callassoftware.com>
Date: Thu, 08 Nov 2007 22:02:58 +0100
To: <eci-en@lists.callassoftware.com>
Subject: Re: [ECI-EN] printing to ISO. is this possible?
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@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.