Epson 4500 - Manual (Page 114)

Enhancing Your Printing
The variable n is a number that identifies the mode or combination of
modes. To find the value of n, use the following table to add up either
the decimal or hexadecimal numbers for the features you want.
For example, to print a title you may want to use double-wide 12 cpi
characters printed in the double-strike mode. You would add three
numbers together to calculate the value of n.
12 cpi 1
D o u b l e - s t r i k e 1 6
D o u b l e - w i d e 3 2
n = 49
After calculating the value of n, you use the Master Select command to
send the value to the printer.
ASCII: ESC ! 1
Decimal: 27 33 49
Hexadecimal: 1B 21 31
Software and Graphics 4-7