Brother HL-1050 Technical Reference Manual page 339

n = "s1" or "S1"
n = "s3" or "S3"
This parameter selects the bar code style as above. When the EAN 8, EAN 13 or UPC-A bar code mode is
selected, this bar code style parameter is ignored.
 Expanded Character shading
"S" 0 = White
1 = Black
2 = Vertical stripes
3 = Horizontal stripes
4 = Cross hatch
e.g. "S" n1 n2
n1 = Background fill pattern
n2 = Foreground fill pattern
If "S" is followed by only one parameter, the parameter is a foreground fill pattern.
2 : 1
2.5 : 1
CHAPTER 8 BAR CODE CONTROL - 6