In a liquid based ink printing process, the low ink consumption, such as in continuous low coverage
printing or complete inactivity of the ink, is limiting fresh ink flow to the ink tank. As a result, the
same ink solution from the tank is used multiple times and stays in the tank for a long time. That
may cause to damage of the ink particles and contamination accumulation in the ink tank, which
leads to Print Quality (PQ) deterioration such as optical density drops, white spots, etc.
Described technic provides an automatic and adaptive method to increase the refreshment of the
ink suspension while printing - enabling a continuous printing process and minimizing “old ink”
phenomena (like fatigue) without wasting ink solution and stopping production at the customer
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INC, HP, "AUTOMATIC ADAPTIVE COLORANT SELECTION FOR BLANKET CLEANING", Technical Disclosure Commons, (November 29, 2020)