Successful Expanded Gamut Printing (EGP) implementation goes beyond adding three inks and relies on three critical technical pillars. The first and most fundamental step is accurate press fingerprinting, where baseline data for density, dot gain, and spectral behavior of all seven inks are measured and recorded on the specific press and anilox rolls. This data forms the scientific foundation of the entire process.

The second pillar is building a dedicated, substrate-specific ICC profile from the fingerprinting data. Using modified CMYK profiles or generic datasets guarantees failure. This profile is the mathematical engine for accurately converting spot colors into seven-color separations. Finally, Statistical Process Control (SPC) with continuous spectrophotometric measurements from a color bar ensures the stability of ink density, dot gain, and registration, identifying deviations before they become critical errors.