Re: colorsync-users Digest, Vol 15, Issue 63
Re: colorsync-users Digest, Vol 15, Issue 63
- Subject: Re: colorsync-users Digest, Vol 15, Issue 63
- From: Fons Put <email@hidden>
- Date: Mon, 27 Aug 2018 07:36:42 +0000
- Thread-topic: colorsync-users Digest, Vol 15, Issue 63
I did some testing for a commercial printer to produce nice looking separations
on rotation offset papers. Typically the designs are separated for
CMYK-sheetfed.
Especially for the lower grade papers (ECO), applying ICC transforms didn’t
bring pleasing results: too flat and lack of color contrast.
Using a set of specific compensation curves to transform the sheetfed designs
seems a good alternative. Gray balance is becoming more attractive and color
contrast is good (Customer was happy with the solution, easy to implement and
fast workflow processing).
Best regards,
Fons Put
Senior Innovatieadviseur
T +32 (0)14 40 39 93
M +32 (0)495 23 21 34
email@hidden<mailto:email@hidden>
VIGC Kenniscentrum Grafische Innovatie
www.vigc.be
VIGC - van kennis naar kunnen
On 25 Aug 2018, at 21:00,
email@hidden<mailto:email@hidden>
wrote:
Send colorsync-users mailing list submissions to
email@hidden<mailto:email@hidden>
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.apple.com/mailman/listinfo/colorsync-users
or, via email, send a message with subject or body 'help' to
email@hidden
You can reach the person managing the list at
email@hidden
When replying, please edit your Subject line so it is more specific
than "Re: Contents of colorsync-users digest..."
Today's Topics:
1. Re: PSO Coated v3 separations (Andreas Kraushaar)
----------------------------------------------------------------------
Message: 1
Date: Sat, 25 Aug 2018 12:58:37 +0200
From: Andreas Kraushaar <email@hidden>
To: Mike Strickler <email@hidden>
Cc: Colorsync Users List <email@hidden>
Subject: Re: PSO Coated v3 separations
Message-ID: <email@hidden>
Content-Type: text/plain; charset=utf-8
thanks :-)
FOGRA52 indeed is quite a special printing condition and the higher the
differences between printing conditions (both in gamut shape and size) the
bigger the challenges. I understand that people expect and easy exchange
between any printing conditions but there are some restrictions ...
regards
Andy
Wir stellen den Hintergrund in den Vordergrund.
We put the background in the foreground.
—————————————————————————
Dr.-Ing. Andreas Kraushaar
Abt. Vorstufentechnik
Fogra
Forschungsinstitut für Medientechnologien e.V.
Einsteinring 1a
85609 Aschheim b. München
Telefon: +49 89. 431 82 - 335
Telefax: +49 89. 431 82 - 100
E-mail: email@hidden
Internet: www.fogra.org
-----------------------------------------------------------------
Geschäftsführer: Dr. Eduard Neufeld | Sitz des Vereins: Aschheim b. München |
Vereinsregister 4909
Am 22.08.2018 um 23:11 schrieb Mike Strickler <email@hidden>:
Andy: I also know of at least one profiling applicaion that includes a “flavor”
of perceptual rendering for device links that does a very deft job of scaling
values close to the white point. I was referring to perceptual tables built
into most ouput profiles. These might not always produce a convincing result.
In any event, what is clear is that Fogra is not to blame for the paper color,
and thus for the characterization.
Mike
Subject: Re: PSO Coated v3 separations
From: Andreas Kraushaar <email@hidden <mailto:email@hidden>>
Date: Wed, 22 Aug 2018 22:00:41 +0200
smtp.mailfrom=email@hidden <mailto:email@hidden>; dmarc=none
Hi Martin, all,
this is a „problem“ or a „feature" with ICC based white point scaling (required
for colorimetrical encoding of data). Rendering neutrals from ab=0,0 to ab=2,5
-10 is quite a change and XYZ-scaling from black to white does not reflect the
required XYZ to be printed to actually get a decent print. The solution would
be to use a perceptual rendering intent that does a grey mapping close to
ab=0,0 and not to what XYZ scaling predicts.
I know many color server device link profiles (F39 - F52 and also ECI-RGB to
F52) that does this job.
regards
Andy Kraushaar
PS: So please believe me that the people that doing this huge (unpaid) efforts
also do check the separation, yes!
Wir stellen den Hintergrund in den Vordergrund.
We put the background in the foreground.
------------------------------
Subject: Digest Footer
_______________________________________________
colorsync-users mailing list
email@hidden
https://lists.apple.com/mailman/listinfo/colorsync-users
------------------------------
End of colorsync-users Digest, Vol 15, Issue 63
***********************************************
_______________________________________________
Do not post admin requests to the list. They will be ignored.
colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden