Re: Colorsync-users Digest, Vol 5, Issue 207 GCR
Re: Colorsync-users Digest, Vol 5, Issue 207 GCR
- Subject: Re: Colorsync-users Digest, Vol 5, Issue 207 GCR
- From: Henk Gianotten <email@hidden>
- Date: Sat, 14 Jun 2008 00:47:22 +0200
Brian, I partly agree.
Web offset, gravure and screen print benefit the most.
But sheet fed offset can benefit too.
Nowadays presses run 18,000 sheets per hour.
Perfectors (up to 12 color units) run 15,000 sheets and they save ink,
powder and have a better, more stable process.
And in the bindery, GCR and TAC harmonized sheets create less
problems.
Louis explained his technology and products.
Several scientific reports (to prove the advantages for web and
sheet fed offset applications) are available.
I will send some scientific stuff to your e-mail address directly.
regards,
Henk
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At 12:22 13-6-2008 -0700, Brian Lawler wrote:
Greetings, all,
Over the years I have heard and read much about PCR/GCR, and to a
degree it is all true.
What is not true is that you will save significant amounts of money on
ink when printing with GCR.
The ink saved is negligible. But, the time saved is very significant,
and more valuable than ink.
GCR benefits web printers (both offset and gravure) and screen
printers. The reason is that gray balance is easier to attain and
maintain.
When you have a machine that is eating up a kilometer of paper every
minute, you don't want to be messing around with color balance.
Screen printers benefit because GCR makes gray balance easier to reach
without going back and making new screens when the color doesn't
balance.
Making color corrections on a moving web press is a very expensive
activity, and should be avoided.
Now... sheet-fed presses. Do they need GCR? Probably not.
It does not hurt to make separations with GCR, but the appearance of
the color in heavy GCR images is not as good as UCR, and on sheet-fed
this can make a difference. I recommend light GCR, if any, when
printing on sheet-fed presses.
The advantages that sheet-fed presses have are:
1. they run slower than web presses
2. they can be stopped when you encounter a problem
UCR separations print nicely on sheet-fed presses, and are easy enough
to balance if all of the other quality control steps are in place.
Anyone who tells you that you can go to the bank with the savings on
ink just doesn't know much about printing.
Best wishes,
Brian P. Lawler
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