Epson 4100 manual Single Density Double Density

232	IBM Proprinter Control Commands
	ESC L or ESC Y					Double-Density Graphics
	ASCII:	ESC	L	(n1)	(n2)	(d1)...(d1632)
	Control:	CTRL [	L	(n1)	(n2)	(d1)...(d1632)
	Decimal:	27	76	(n1)	(n2)	(d1)...(d1632)
	Hexadecimal:	1B	4C	(n1)	(n2)	(d1)...(d1632)
	ASCII:	ESC	Y	(n1)	(n2)	(d1)...(d1632)
	Control:	CTRL [	Y	(n1)	(n2)	(d1)...(d1632)
	Decimal:	27	89	(n1)	(n2)	(d1)...(d1632)
	Hexadecimal:	1B	59	(n1)	(n2)	(d1)...(d1632)

Causes the printer to print double-density graphics. Double-density graphics are printed 120 dot columns per horizontal in.

The following illustrates the difference between single-density and double- density graphics:

Single Density Double Density

AB0-AI1

Use ESC L to print double-density graphics at double-density speed.

Use ESC Y to print double-density graphics at single-density speed. ESC Y causes alternate dots to be skipped during printing.

The maximum number of dot columns that can be reserved per line in double-density graphics is 1632.