Appendix A — Specifications
PB21 and PB31 Mobile Receipt Printer User Guide 67
When you order printer media, keep these points in mind:
• Tag and fanfold media use black marks as repeat indicators for
non-continuous media. Black marks are sensed on the side of the
media that is thermally sensitive.
• You can use higher caliper media in the printer, but print quality
will be reduced.
• Receipt roll stock media is supplied as a continuous roll and has
an end of roll indicator. The end of roll indicator is a red marking
(on last 3 feet of roll) on the side of the paper that is thermally
sensitive.
Print Speed and Resolution
Print speed: 4 ips (100 mm/s)
Resolution: 203 dpi (8 dots/mm)
Print Technology
Printhead: Direct thermal
Maximum print width: PB21 48 mm (1.8 in)
PB31 72 mm (2.8 in)
Media Specifications
Minimum black mark length: 3.17 mm (0.125 in)
Black mark width: Full width of media
Core inside diameter: 19.05 mm (0.75 in)
Roll outside diameter: PB21 57.15 mm (2.25 in)
PB31 67.31 mm (2.65 in)
Tracking: Center
Maximum caliper for tags: 0.15 mm (0.006 in)
Minimum media length: 12.7 mm (0.5 in)
Maximum media length: Continuous