Double Dots
Double Dots
- Subject: Double Dots
- From: email@hidden (Anthony Sanna)
- Date: Mon, 2 Apr 2001 14:57:15 -0600
Last year I needed to profile a press that would be running a job in
CRYB, or ProcCyan/PMS485/ProcYellow/PMS497. The package, which was
primarily strawberries & chocolate, benefited from altering the standard
inks.
Using PrintOpen 3.0.1 I generated a 4-color, 100% ink limit .tif, and
sent it to the engraver who used his Digital WaterProof to simulated the
PMS colors. From that, I generated a profile with settings of 300% ink,
95% black, and 70% GCR. I can't remember why those numbers were chosen,
but it had to be from information from the printer, International Paper,
and the engraver. The job, canister sidewalls was run on a high-finish
board similar to a milk carton stock.
The profile worked well for repeated runs of the design, but when label
changes were due this year, the resulting films produced a much sharper
dot that left some of colors lacking. Did I say that IP had moved its
operations to a new plant and presses in the interim?
I've got a new CRYB design in the works now, and I've asked the engraver
to rerun the PrintOpen target for me. So here's the question...........
The engraver's Digital WaterProof should be keyed to the characteristics
of press, right? The press gain should be accounted for in the proofing,
so that when I generate the profile from the PrintOpen target, it should
have the press' dot gain built in. That would be the way it would work
if I ran the targets on press. So now, when I separate my file to this
CRYB profile, the file should have those gain curve adjustments. Right
so far?
But when I send the file back to the engraver for films, could the extra
sharp dot be coming from a double-dose of press-gain correction - once
via the profile, another at film output.
Most of the label image from last run, the key elements at least, really
benefited from the sharper dot. However some of it suffered, and I would
like to balance the separations so that it runs more easily and looks
better overall. The pressman at the new facility was eager to credit his
new press and tighter controls, and this may be the case, but before I
started pursuing this with the engraver, I wanted to make sure that I
have my methods in order.
Tony
Anthony R. Sanna
Vice-President
SACO Foods, Inc.
6120 University Avenue
Middleton, Wisconsin 53562 USA
email@hidden
www.sacofoods.com
1-800-373-7226
(608) 238-9101
(608) 238-8149 - fax