Test pattern, test pattern printing method, and printing device

A printing device that prints a test pattern on a medium by ejecting inks onto the medium from an inkjet head including a plurality of nozzle portions, the printing device is configured to form:

• first base lines in a first direction by ejecting inks onto the medium from first nozzle portions of the inkjet head;
• and
• first blocks and second blocks by ejecting inks from second nozzle portions of the inkjet head which are provided at intervals from the first nozzle portions in the first direction,
• wherein
• the first blocks are formed on one side of each of the first base lines in a second direction orthogonal to the first direction, and the second blocks are formed on the other side of each of the first base lines.

A test pattern that is printed on a medium with inks ejected from a first inkjet head and a second inkjet head, the test pattern comprising:

• first lines and second lines printed alternately in a first direction,
• wherein
• the first lines are formed with inks ejected from a plurality of nozzles of the first inkjet head which are arranged in a second direction orthogonal to the first direction, and
• the second lines are formed with inks ejected from a plurality of nozzles of the second inkjet head which are arranged in the second direction.