Brady BP-1244 Operator's Manual page 48

The second label printed is the Dot Check Label. This label is used to
determine whether the printhead is in need of replacement. 'Good' and
'Faulty' Dot Check Labels are shown below:
38
Good Test Label:
Even pattern consistency
indicates that the printhead
is operating normally.
Faulty Test Label:
Streaks in the pattern
indicate a dirty or faulty
printhead (see Chapter 5).
BP-1244/BP-1344