Printronix LQH-HWTM - Manual (Page 158)

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Chapter 3 Bar Codes
POSTNET
The POSTNET bar code structure is illustrated in Figure 30 and Figure 31 and
described on the following pages. The POSTNET code can be a part of the
address block and appear anywhere within a vertical 4-inch area across the
length of the mail piece.
Figure 30. POSTNET Structure
Return Address Area Postage Area
1/2" 1/2"
BAR CODE DATA FIELD START STOP
QUIET ZONE
CODE CODE
SR, SC
POSITION
QUIET ZONE
CHECK DIGIT
NOTE: Illustration is not to scale
QUIET
ZONE QUIET
ZONE
ADDRESS BLOCK BAR CODE READ AREA
4"
Note Additional information regarding POSTNET bar code
requirements can be obtained from the U.S. Postal Service’s
Publication 25:
A Guide to Business Mail Preparation.