Yes, we did plate corrections to get
standard tone value increase!
If I can ask: how do you print on papers
that are somewhere in between type 2 and type 4? What targets are you using?
regards,
Juris
Martin Weberg <martin.weberg@gmail.com> Sent by: eci-en-bounces@lists.callassoftware.com
2010.02.24 16:09
Please respond to
eci-en@lists.callassoftware.com
To
eci-en@lists.callassoftware.com
cc
Subject
Re: [ECI-EN] paper types and target
LAB values
Hi Juris
2010/2/24 Juris Valdmanis <bebris@jt.lv>:
> But from documentation papers type 1 and type 2 have the same Lab
target
> values for primary and secondary colors. >From my previous conclusion
papers
> like fine gloss (with 3 coating layers) and rough matt (with only
one
> coating layer) have same Lab target values.
Thats, true.
> No problems with type 1 (gloss) papers, as we can get very close to
target
> values and densities are ordinary.
> But for mate papers (type 2) we have to rise densities to get acceptable
Lab
> values. It could be understandable as paper surface is rougher and
you have
> to apply more color to get same saturate colors as on paper type 1.
> Problem is that higher densities however lead to different problems
in
> postpress as paper is not drying well and it smears.
Are those "high" densities tried using standard tone value increase
(i.e. correct plate corrections)?
Maybe some of those troublesome type 2 papers behave more like type 4
papers or maybe somewhere in between (i.e. not suitable for ISO
12647-2 production).
> And also I did not find answer to another question: Are Lab target
values
> for wet or dry colors?
It is dry colours. You need to establish wet density values for those
dry Lab values.