Method of determining operating drive voltage of an in-jet head, ink-jet recording apparatus and superposed-pattern-recorded article

An ink-jet recording apparatus, comprising:

• an ink-jet head which has an actuator and which ejects, as a result of driving of the actuator, ink droplets toward a recording medium during a relative movement of the ink-jet head and the recording medium for performing recording, the ink-jet head being configured such that an ejection speed of the ink droplets varies depending upon a drive voltage to be applied to the actuator;
• and
• a control system which controls the ink-jet recording apparatus and which has a function of executing an operation of recording a first record pattern as a result of driving of the actuator by application of a tentatively determined first test voltage and a second record pattern as a result of driving of the actuator by application of a second test voltage different from the first test voltage, so that the first record pattern and the second record pattern are superposed on each other.

A superposed-pattern-recorded article that is a recording medium on which a superposed pattern is recorded,

• wherein the superposed pattern is recorded by an ink-jet head which has an actuator and which ejects, as a result of driving of the actuator, ink droplets toward the recording medium during a relative movement of the ink-jet head and the recording medium for performing recording, the ink-jet head being configured such that an ejection speed of the ink droplets varies depending upon a drive voltage to be applied to the actuator,
• wherein the superposed pattern is recorded by recording a first record pattern as a result of driving of the actuator by application of a tentatively determined first test voltage and a second record pattern as a result of driving of the actuator by application of a second test voltage different from the first test voltage, such that the first record pattern and the second record pattern are superposed on each other, and
• wherein the superposed pattern is arranged such that it is possible to judge, on the basis of an appearance thereof, whether or not the first test voltage is proper as an operating voltage of the actuator.