Diamond Eye controls colour automatically without the use of colour control strips or marks. For this purpose, a special line sensor is used that works with several LED light sources (RGB and IR). The image sensor is located at the delivery of the printing unit.

Jaideep Sengupta, sales manager printing and packaging division at MHII, said: "This inline quality control system takes the guesswork out of colour matching by using scanning sensors that measure actual printing density, comparing this data to image density values based on plate-making data, and then compensating for calculated variations through ink key adjustments."

Sengupta added: "Diamond Eye serves as an inline print quality defect detection system to detect and eject defective copies by comparing target density data based on good copy to actual print density acquired by image sensors."

MHII launched the Diamond Eye in 2007 and since then, the Japanese manufacturer has installed more than 50 systems.