GRACoL Launches G7 Press Pre-Qualification Project

About G7™

G7 is an IDEAlliance specification that outlines methods to calibrate proofing systems and presses based on principles of digital imaging, spectrophotometry, and computer-to-plate (CtP) technologies. The goal of G7 is to simplify calibration and help printers reliably achieve a close “visual match” from proof to press and from press to press. G7 is intended to be in compliance with the ISO 12647 Standards and has incorporated aim values from ISO 12647 into their process. G7 is unique, however, in that it breaks from tradition by focusing on colorimetric data for gray balance in the mid-tones, image contrast and image weight in a precise and 100% colorimetric manner rather than relying totally on densitometric aims, i.e. dot gain, for each color which alone does not define vital visual metrics of an image. With G7, widely different printing processes can share not only common gray balance, but also common tonal contrast and image weight, regardless of paper type, ink quantity, screening type or imaging technology. This “shared appearance” concept offers a significant new default compatibility benefit when exchanging files between different imaging systems. G7 is currently being applied to many types of printing including commercial and publication printing, newsprint and even flexo and gravure. G7 is the trademark and intellectual property of IDEAlliance.