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Topic: G7 calibration documentation (Read 4260 times) previous topic - next topic

G7 calibration documentation

Is there any comprehensive documentation out there about the G7 calibration process? I keep finding a lot of general information but nothing that outlines the physical requirements or the physical steps involved. We've decided to go the G7 route but I sure would like to know more specifics. Any help is appreciated.


Re: G7 calibration documentation

Reply #2
The thing is, all of the links are a giant circle jerk. They never actually lead to any definitive steps you can follow. You're pretty much locked in to paying a "Qualified Consultant" to come into your shop & perform the first round of calibrations. What a racket, must be nice to be dictating these industry standards.
A little diddie ‘bout black 'n cyan...two reflective colors doin’ the best they can.

Re: G7 calibration documentation

Reply #3
I know this is an old post, but as I'm just starting to jump into G7 calibration myself...

Anyway, if you go to gracol.com there's a link for the "G7 & GRACoL Qualification Kit 2010" that's been updated, contains alot of info, and even step by step instructions.
http://files.idealliance.org/GRACoL/Qualkit/G7QualificationKit_GRACoL.zip

Unfortunately, you have to use a G7 Expert to submit your datasets to IDEAlliance.

Re: G7 calibration documentation

Reply #4
Run your test target on press, measure it, make appropriate curve to get to G7 standard, put back on press, measure again repeat if necessary until you are in G7 spec.

Re: G7 calibration documentation

Reply #5
From when I work with a guy to get G7ish. THe process can be done by you it just needs a specialist to say you are so you can advertise it I think. "G7 Certified"

The inks need to run to a Color more than the density. If the inks don't meet the required color then it wont work right.

Then it is like any other plate curve building.
You set you goals and make the plates print to them.

I am sure it is a little more complicated but the goal is to run plates to a desired look. They give you the charts and your goal curves just shoot for them It may not be certified but it is a nice looking print when you are even close. Using the same idea I had a 4 color press and Designer we adamant about using Spot PMS 3005 on all work. I made the curves work so the CYMK looked close if not better using PMS 3005 instead of Cyan.

You also need pressman that follow RULES when printing. Consistant color density if your lucky. Some think they have they "EYE" the problem is I think at one time I did but as we get older those whites always look a little yellower. Good luck it is fun if you have the time understanding the press and its relationship with the plates you make. Each Press is different and each press runs different with different pressman.

only  a few issues to multiply your problems.

"dyslexics have more fnu"

Re: G7 calibration documentation

Reply #6
From when I work with a guy to get G7ish. THe process can be done by you it just needs a specialist to say you are so you can advertise it I think. "G7 Certified"

The inks need to run to a Color more than the density. If the inks don't meet the required color then it wont work right.

Then it is like any other plate curve building.
You set you goals and make the plates print to them.

I am sure it is a little more complicated but the goal is to run plates to a desired look. They give you the charts and your goal curves just shoot for them It may not be certified but it is a nice looking print when you are even close. Using the same idea I had a 4 color press and Designer we adamant about using Spot PMS 3005 on all work. I made the curves work so the CYMK looked close if not better using PMS 3005 instead of Cyan.

You also need pressman that follow RULES when printing. Consistant color density if your lucky. Some think they have they "EYE" the problem is I think at one time I did but as we get older those whites always look a little yellower. Good luck it is fun if you have the time understanding the press and its relationship with the plates you make. Each Press is different and each press runs different with different pressman.

only  a few issues to multiply your problems.



Sheets need to be submitted by an G7 expert and certified by RIT. Then you get you handy dandy little plaque.

Re: G7 calibration documentation

Reply #7
Whoa, G Town came back. Nice to see you, stranger!
No Facebook, no iAnything. What am I missing?
2009 Mac Mini, OSX 10.6