Plain English

Sets the print darkness (head temperature). Higher values make the print darker but can cause smearing or ribbon wrinkle on thermal-transfer labels. Lower values produce lighter print but use less ribbon and extend head life.

When to use

When adjusting print quality — increase if barcodes aren't scanning, decrease if print is bleeding or smearing.

Syntax

ESC+#Fnn

Parameters

ParameterDescription
nnDarkness level (printer-dependent, typically 01-20)

Example

ESC+A
ESC+#F10
ESC+H0100
ESC+V0050
ESC+BG020100TEST-DATA
ESC+Q1
ESC+Z

Set medium darkness for barcode printing

Try it in the playground View all SBPL commands