Controlling Color by Varying Solid Ink Density

Four-color lithographic presses have many printing variables that can affect color quality and consistency. A color proof is calibrated to match the controlled press conditions to be used as a control tool for the press control. The press is then controlled by varying the ink amount to compensate for the many printing variables that affect the printed result. A densitometer properly used could monitor the color hue and strength as compared to the OK sheet that would monitor the printed color in a manner consistent with the customer's desires.