Re: VOP (was Dumb question for european prepress specialists)
Re: VOP (was Dumb question for european prepress specialists)
- Subject: Re: VOP (was Dumb question for european prepress specialists)
- From: Henk Gianotten <email@hidden>
- Date: Mon, 28 Nov 2005 19:55:43 +0100
At 07:26 28-11-2005 -0500, Roger wrote:
Come to think of it, Rich, I believe you are right in that both these guys
probably need different inks. And they still need to achieve comparable
colors on their press. Which says a lot about their colorimetric aimpoints.
What do you think?
Roger Breton
Hi,
I think that the ink producers will differentiate the inks for 4-color
perfectors versus 4-color.
And change some tack if needed.
But they don't deliver VSOP inks for VOP's. (Very Old Presses!)
Printers will sometimes have to use additions for special applications but
there seems no need to differentiate ink based on presses (Heidelberg
versus Roland-Man) or new versus old.
There are a huge number of other selection criteria (packaging versus
leaflets or short life time versus long life time or long sun-exposure).
But that's mostly physical and sometimes influences the selection of pigments.
Those specialities sometimes differ from ISO 2846-1.
But these differences can be measured and described so the printer can take
the needed steps to correct the color. If needed.
The other criteria for print (plates, dot structure, dot gain, ink-water
balance etc. etc) have a far greater influence.
The goal of combinations of standards such as ISO 2846-1 and ISO 12647-2 is
that more printers can print (on different presses) identical magazines.
So the advertiser may expect identical colors. And the editor will benefit
too. And all other customers.
They get what was agreed and shown on a proof.
Yes, more skills are needed to reach that situation.
And more skills and experience to create a stable process.
Rich,
if you refer to very old presses an unacceptable dot gain could occur.
Yes, than you have to use a few more tricks to correct that behavior.
If the dot gain is always unstable (very old press) there is no reason to
print according to any standard.
Use such a machine for other products.
I think,
Regards,
Henk
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