G7

[dadeo1717]

Can any on tell what you use to measure G7 standards and anything you know about G7?
We are thinking of trying to get G7 certified at our shop.

[TechnaPrint]

G7 is a printing standard that helps you keep your blacks neutral.
We have been using G7 for three years now and our customers love it. We are very consistent and our proofs match the presses 99% of the time. It really does make printing photos look better, however, we do have a little issue with light pastels and tan colors (they tend to be slightly lighter on the proof).

For more info, check out "http://idealliance.org/industry_resources/branding_media_and_color/g7"

As to what we do-
We hired someone to come and go through the G7 certification with us for the initial certification. We have been doing it ourselves for the last two year to re-certify. We use an Eye-One at the press to read custom color bars (from SpotOn!) that we have added to each press sheet to verify that we are running to the G7 spec on every job. To verify G7 compliance, we use a Xrite DTP-70 to read the press sheets in to the computer. Then we use ColorPort and Curve 2.0 to read and analyze the press sheets.

Hope this helps.

[gordo]

G7 is a printing standard that helps you keep your blacks neutral.

A small clarification - G7 is a method not a standard. The method defines a colormetric definition for gray balance rather than to keep blacks neutral.

best, gordo

[Bloodsaler]

Gracol and swop is the standard,but G7 is the method to carry out gray balance result~

[dadeo1717]

Thank for the info as we are considering going G7 in our shop. I was wondering what the pressmen think of this method and was it a big change in the way they print? Also don't you have to use a different denesitometer that measures L a b ?

[gordo]

Thank for the info as we are considering going G7 in our shop. I was wondering what the pressmen think of this method and was it a big change in the way they print? Also don't you have to use a different denesitometer that measures L a b ?

Most press operators don't care much about the methods that prepress uses. What you may decide to do is to determine the solid ink densities using a densitometer at the correct Lab values measured with a spectrophotometer. Once set up, the press operator can continue to use solid ink densities in day to day production while a spectrophotometer shared with prepress is used for color checks as needed or if problems arise.

best, gordo

[rich apollo]

Thank for the info as we are considering going G7 in our shop. I was wondering what the pressmen think of this method and was it a big change in the way they print? Also don't you have to use a different denesitometer that measures L a b ?

Shouldn't matter to the pressman at all. Match the proof, or don't match the proof - end of story.

You don't need any special devices other than during the calibration runs. The calibration takes you through the process of determining the density and TVI values that will bring you into compliance. You can pretty much monitor the press runs densitometrically - even gray balance.

If you decide to monitor compliance with something like SpotOn, pressSIGN, or PrintStandardizer; then you'll need a spectrophotometer.

[CKL]

Techna print, 99% is a great number.
What do others see on average? job to job.

How many different curves are required?
How many different presses run off of the same curve?
How many different papers are certified?

Thanks

[David Milisock]

I was wondering how much value the standard has with the reduced run length these days

[gordo]

I was wondering how much value the standard has with the reduced run length these days

Why would run length make a difference?

gordo