TP UP-PN24S, Руководство пользователя

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After power on, printer default the black mark has been at the paper tear
bar. The content to be printed should be between two black marks in sequence.
This command is valid only on using the paper with pre-printed black
mark.
Notice for black mark printing:
The black mark should be printed on the printing side of the paper. The
position of the black mark is the paper tearing line.
The position and size of the black mark printed are shown as below
picture.
The reflectivity of the black mark printed should be less than 10%, and
the others along the feeding direction should be more than 75%.
Explanation for printing area:
Printing area is shown as below figure.
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n1: valid printing area.
n2: distance from the first printing line to the paper tearing line. n2=20mm.