G7 Qualification : The Art of Maintaining Color

Being able to hit the G7 mark repeatedly means being able to track printing conditions, Ellis wrote in his study titled, “Good G7 is Not Cheap; Cheap G7 is Not Good.” Some of the signs include:

• Proofer wandering away from calibration;

• Changes in dot gain by cylinder;

• Color changes due to ink batch variation or contamination; and