Hi Morgan,
I just finished a project to "harmonize" all incoming files for a sheet fed
offset printer.
It's based on a Heidelberg/Callas/Alwan workflow and the TAC for uncoated
is max. 260% and
the TAC for coated is max. 300%. Even the 320% files (regular ISOcoated)
get a TAC/GCR treatment.
The GCR is just a little bit higher than the ECI-conditions.
The printers and the finishing guys love it.
By the way, for rich black backgrounds (photo magazine) they use K 100%, C
50%, M 40% and Y 40%.
Total 230% for coated and K 95%, C 40%, M 30% and Y 30% for uncoated.
Totals 195%.
The images in the black background improve a lot.
In the past they used just 100K without any addition of color.
That's a to high contrast with regular images. (100% versus 300%).
Trapping (knockouts etc) have to be OK.
On a 70 x 100 cm machine and good paper/shop conditions this is no problem.
Henk
At 14:41 14-3-2008 +0100, you wrote:
We are using "Binuscan PDF Server" and
converting ISOuncoated (320) 2 to
Press-profile with TIC@250 (delta E 1).
Works great!
/ Magnus
14 march 2008 14:31 wrote Jo Brunenberg:
>Concerning: TAC of ISOuncoated profile
>
>Following the question of Morgan I have a question as well on this subject:
>
>- Is the present TAC value in the ISOuncoated profile (320%) acceptable
>for sheetfed offset printers? As Morgan states that it is too high for
>his press room I am wondering what are the experiences of other sheetfed
>offset printers?
>- By the way: We are using a modified version (TAC 240%) of this profile
>for web offset.
>
>Best regards,
>Jo Brunenberg
>ROTO SMEETS
>
>
>
><mailto:eci-en@lists.callassoftware.com>eci-en@lists.callassoftware.com,Internet
>writes:
>
>Message: 2
>Date: Wed, 27 Feb 2008 11:11:40 +0100
>From: Morgan Axelsson
><<mailto:morgan.axelsson@atta45.se>morgan.axelsson@atta45.se>
>Subject: [ECI-EN] Uncoated paper in Sheetfed enviroment
>To: <mailto:eci-en@lists.callassoftware.com>eci-en@lists.callassoftware.com
>
>I dont know were to go
>At our printphop we have Heidelberg sheetfed presses
>Two 8c 70x100
>One 8c 50x70
>one 5c 70x100
>
>We are thinking of changing our colour management workflow into ISO
>standard
>the
>ISOcoated_v2_300_eci Will probebly work fine
>but the
>ISOuncoated
>We have a problem with that profile, it?s set to total ink coverage of
>320% even more than the coated one
>These days we have around 260% of total ink coverage on uncoated paper
>in sheetfeed environment
>
>This is a problem we have if we should make it easy for our client to
>start using ISO standard
>
>Do any have any solution or idea for future ISO profiles for sheetfed
>presses
>
>Regards
>Morgan Axelsson