Brother RJ-4040 - Manual (Page 39)

ESC/P Command Reference
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5. Control Command Details
DC2 Cancel compressed characters
ASCII: DC2
Decimal: 18
Hexadecimal: 12
Parameters
None
Description
 Cancels compressed characters specified with SI.
DC 4 Cancel auto-canceling double-width characters
ASCII: DC4
Decimal: 20
Hexadecimal: 14
Parameters
None
Description
 Cancels double-width characters specified with ESC SO or SO.
 Does not cancel the ESC W command.
Example
Code: ABC ESC SO ABCDEF DC4 GHIJK FF
Print result: ABCABCDEFGHIJK