If the printing is unclear, you should consider whether the consumables used match. if they match, you can adjust the printing speed and depth. the specific operations are as follows:

1: Whether the consumables match

 First use matching supplies to print good results:

1、wax-based ribbon—coated paper self-adhesive, etc.

2、mixed base ribbon—coated paper self-adhesive, clothing tags, some matte jewelry labels, etc.

3、full resin ribbon— PET、PVC、 jewelry labels etc.

4、washable label ribbon—non-woven fabric, satin ribbon, etc.

2: Adjust printing speed and depth on the premise that the consumables match, the speed and depth of the printer can be adjusted：

via printer driver or BT software settings: print-properties-options. reduce print speed or increase print depth:

3. The print settings are not set properly or the print head is dirty:
      solution: first check whether the print head is dirty, clean the print head (note: be sure to turn off the printer power when cleaning the print head, otherwise the print head is easily damaged), then set the printing temperature or change a font try it (font bold). if it still doesn't work, the quality of the printing ribbon or label paper may be too poor. replace the ribbon and label paper with good ones.

4. Printing is not clear and black lines appear:
reason: the print head is dirty or the print head needle is broken.
solution: clean the print head first. if that doesn't work, you can only replace the print head. (note: when cleaning the print head, be sure to turn off the printer power first, otherwise the print head will be easily damaged)

5. When printing, one side is clear and the other side is light:

cause: the printer pressure is unbalanced.
solution: there is a pressure-adjusting screw button above the print head. just increase the pressure on the side where printing is not clear. in addition, some machines only have one screw knob to adjust, but it can move freely. then move it to the unclear side and increase the pressure. OK .