G7 press calibration, best press conditions or average?
G7 press calibration, best press conditions or average?
- Subject: G7 press calibration, best press conditions or average?
- From: Steve Miller <email@hidden>
- Date: Fri, 31 Oct 2008 16:09:31 -0500
- Thread-topic: G7 press calibration, best press conditions or average?
Thanks for all your comments.
Rich,
> it's tough to get back to "average". That "average"
> state is not repeatable.
That's what I was thinking. If you start with the best conditions, you can
more easily get back to that condition.
Mike S.,
Your comment reinforces Rich's comment
> If the press is in its best condition with new blankets you have a
> reference baseline to return to when things go awry. You can't say
> the same of "average" condition.
Mike E.,
I liked your comments as well. Without being a press operator myself, I
would think that it's all decline after the ideal. But at what state does
the press stay the most consistent for the longest period of time? I believe
"trending" is the answer I'm looking for.
> Of course there's the possibility that
> its all decline after the ideal with no break in period...trending
> might give you more insight here.
Paul,
> A conventional offset printing press cannot be "calibrated". Presses are
> "adjusted" by press operators.
I used the words "press calibration" because that's what most people I've
talked to call it. It's easier than saying "Using the G7 methodology to aim
at an ISO standard printing condition".
There's a trending software available and is described as follows...
"A product that is designed to help printers save money in the pressroom by
helping: Reduce the cost of calibrating a press to an ISO12647 based print
specification."
Then it goes on to say...
"What does it do?
Calibrate Press Gamut to ISO12647
Assist press operators in calibrating their press to ISO12647 based print
specifications. (FOGRA/GRACoL/SWOP)"
Then there's IDEALink Curve software that's described as the following...
"IDEALink Curve is your link to simple G7 implementation. Easily
calibrate and verify all your systems without the tedium and uncertainty of
manual curve drawing."
I liked this comment
> If the deviations in color to color register surpass a certain limit, you
> (the press of course) need "maintenance".
Again, this goes back to the importance of trending.
> When it is no longer possible to aim at your standard printing condition you
> need to find the cause for this failure. Why would you use the G7
> methodology for this?
I have no intention of using the G7 method to find the cause of failure.
Marco,
I always enjoy reading your responses. Thanks.
Roger,
> What do you do when it's a brand new press?
I wish I could work with a brand new press.
>
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