13
4.2 Description of Black Mark Pre-print
If user use pre-print black mark to locate the receipt, please be sure to abide
by the following black mark pre-print regulation when print the black mark
paper, if not ,it will cause that the printer can not identify the black mark.
The black mark pre-print regulations are as below:
Printing Position: As the picture above, the black mark should be printed on
the right or left edge of the side of words.
Width range: width≥7mm
Height range: 4mm≤height≤6mm
Reflectivity of infrared ray : <10% (infrared ray reflectivity of other parts of the
black mark paper is>65%)
HPS: it is the distance between edges of black mark and loading position.
4.5mm≤Hps≤6.5mm
