Method of forming ink ejection adjustment pattern, ink ejection adjustment method for inkjet head and inkjet printer

Abstract

An ejection adjustment pattern forming method of forming an ejection adjustment pattern on a print medium with an inkjet head, which has a plurality of nozzles, with moving the inkjet head in a predetermined scanning direction. The method forms a plurality of thickness measurement patterns respectively on a plurality of pattern forming areas defined on the print medium by causing the plurality of nozzles of the inkjet head to eject ink drops, and forms a plurality of judging patterns respectively on the plurality of pattern forming areas. The ejection conditions of the plurality of nozzles, when the plurality of thickness measurement patterns are formed, are the same among the plurality of pattern forming areas. Further, the ejection conditions of the plurality of nozzles when the first judging pattern is formed and when the second judging pattern is formed are the same among the plurality of pattern forming areas.